Definitions

Question 1

A posteriori

Answer 1

Knowledge that can only be acquired from experience of the external world.

Question 2

A priori

Answer 2

Knowledge that can be acquired without experience of the external world, through thought alone.

Question 3

Abductive argument

Answer 3

A form of inductive argument which shows says that something is probably true because it is the best explanation. Perhaps due to its explanatory and predictive power, or because it makes the fewest assumptions (Ockham’s razor).

Question 4

Ability knowledge

Answer 4

Knowledge of how to do something. For example, knowing how to ride a bike or how to juggle.

Question 5

Acquaintance knowledge

Answer 5

Knowledge of something or someone. For example, “I know James well” or “I know Berlin well”.

Question 6

Analytic reduction

Answer 6

If X analytically reduces to Y, then the meaning of X is the same as the meaning of Y. For example, “triangle” analytically reduces to “3-sided shape” because the meaning of “triangle” is “3 sided shape”.

Question 7

Analytic truth

Answer 7

A proposition that is true in virtue of the meaning of the words. For example, “A bachelor is an unmarried man” or “triangles have 3 sides” or “1+1=2”. Denying an analytic truth results in a logical contradiction.

Question 8

Antecedent

Answer 8

The first part of a conditional statement such as “if A then B”. In this example, the antecedent is “if A…”.

Question 9

Arête

Answer 9

An ancient Greek word used by Aristotle to describe a property or virtue that enables something to achieve its ergon (function). For example, the arête of sharpness enables a knife to achieve its function (to cut things).

Question 10

(Hard) Behaviourism

Answer 10

The view that propositions about mental states can be (analytically) reduced without loss of meaning to propositions about behaviours using the language of physics.

Question 11

(Soft) Behaviourism

Answer 11

The view that propositions about mental states are propositions about behavioural dispositions.

Question 12

Blik

Answer 12

An unfalsifiable belief that is held in the face of conflicting evidence, but that is nevertheless meaningful.

Question 13

Categorical imperative

Answer 13

According to Kant, the categorical imperative we should all follow is to “act only according to that maxim whereby you can at the same time will that it should become a universal law without contradiction”.

Question 14

Cognitive statement

Answer 14

Cognitive statements aim to literally describe how the world is and are either true or false. For example, “water boils at 100°c” or “triangles have 3 sides”.

Question 15

Consequent

Answer 15

The consequent is the second part of a conditional statement such as “if A then B”. In this example, the consequent is “…then B”.

Question 16

Consequentialist

Answer 16

An ethical theory that values as actions as good or bad according to their consequences.

Question 17

Contingent truth

Answer 17

Something that is true but that might not have been true. For example, “Paris is the capital of France” is a contingent truth because they could have made Lyon the capital instead.

Question 18

Contradiction

Answer 18

Two claims contradict one another if they cannot both be true simultaneously.

Question 19

Contradiction in conception

Answer 19

A maxim leads to a contradiction in conception if it would somehow be self-contradictory for everyone to follow it. For example, if everyone followed the maxim “to steal” then it wouldn’t even be possible to steal because there would be no private property.

Question 20

Contradiction in will

Answer 20

A maxim leads to a contradiction in will if you cannot rationally will that everyone follow it. For example, you cannot rationally will the maxim “never help people in need” if you yourself expect other people to help you when you’re in need.

Question 21

Deduction

Answer 21

A method of deriving true propositions from other true propositions (using reason and logical necessity). It is an a priori method of gaining knowledge.

Question 22

Deductive argument

Answer 22

An argument where the premises are intended to logically guarantee the conclusion (i.e. an argument that is intended to be logically valid).

Question 23

Deontological ethics

Answer 23

Ethical theories that focus on duty, or what must be done. For example, Kant says we have a duty to follow the categorical imperative.

Question 24

Direct realism

Answer 24

The view that a mind-independent external world exists and that we perceive it directly.

Question 25

Disjunction introduction

Answer 25

The logical principle that if the statement “P” is true, then the statement “P or Q” must also be true.

Question 26

(Ordinary) Doubt

Answer 26

Being unsure whether something in your everyday life is true.

Question 27

(Philosophical) Doubt

Answer 27

Being unsure whether anything you believe is true. For example, you might doubt your perceptions and your own thoughts (and thus any beliefs formed from them) because of the possibility of global sceptical scenarios.

Question 28

(Substance) Dualism

Answer 28

The view that minds can exist completely separately from physical bodies. In other words, there are two different kinds of substance: physical bodies and non-physical minds.

Question 29

(Property) Dualism

Answer 29

The view that physical substances can have non-physical mental properties. These mental properties are neither reducible to nor supervenient upon physical properties.

Question 30

Eliminative materialism / Eliminativism

Answer 30

The view that our common sense understanding of mental states (folk psychology) is radically mistaken and that some or even all of these mental states don’t exist and should be eliminated in favour of more accurate neuroscientific alternatives.

Question 31

Emotivism

Answer 31

The metaethical view that moral judgements express (non-cognitive) emotional attitudes.

Question 32

Empiricism

Answer 32

Empiricism says all knowledge of synthetic truths is acquired a posteriori. Empiricism also says there is no such thing as innate knowledge and that all (propositional) knowledge is acquired after we are born.

Question 33

Epiphenomenalism

Answer 33

A form of dualism that says that the mental and physical interact in only one direction: From physical to mental. For example, getting hit in the (physical) head causes the mental state of pain, but my mental state of pain don’t cause anything itself.

Question 34

Ergon

Answer 34

An ancient Greek word used by Aristotle to describe the function or characteristic activity of a thing. For example, the ergon of a knife is to cut things.

Question 35

Error theory

Answer 35

The metaethical view that moral judgements express cognitive statements but that moral properties don’t exist and so all moral judgements are false. For example, “murder is wrong” is false because “wrongness” doesn’t exist as a property.

Question 36

Eudaimonia

Answer 36

An ancient Greek word used by Aristotle to describe the good life for a human being in the broadest sense. It is sometimes translated to “human flourishing”. Eudaimonia is an objective property of a person’s whole life and is the final end for humans.

Question 37

Eternal

Answer 37

God is said to be eternal if He exists outside of time.

Question 38

Everlasting

Answer 38

God is said to be everlasting if He exists within time but is without beginning or end.

Question 39

Fallacy

Answer 39

The use of invalid or otherwise faulty reasoning.

Question 40

Falsifiable

Answer 40

A belief or proposition that is incompatible with some possible observation. In contrast, an unfalsifiable proposition is compatible with every possible observation, and is thus said to be meaningless.

Question 41

Felicific calculus

Answer 41

Bentham’s formula for calculating net pleasure and thus for deciding the correct course of action according to act utilitarianism.

Question 42

Final end

Answer 42

Something that is valuable in itself. You do not need to give further reason why it is valuable – it is valuable for its own sake.

Question 43

Folk psychology

Answer 43

Our common-sense our understanding and model of the mind and mental states. For example, ‘happy’, ‘sad’, ‘pain’, and ‘belief’ are all folk-psychological concepts.

Question 44

Functionalism

Answer 44

The view that mental states can be characterised by their functional role within a cognitive system. The functional role of pain are multiply realisable: an octopus, an alien, and a human can all feel pain.

Question 45

Gettier case

Answer 45

An example of a justified true belief that is not knowledge. Gettier cases thus show that the tripartite definition of knowledge does not provide sufficient conditions for knowledge.

Question 46

Good will

Answer 46

To be motivated by and choose your actions for the sake of duty, according to Kant.

Question 47

Hume’s Fork

Answer 47

David Hume’s claim that there are only two judgements of reason: relations of ideas (i.e. the opposite is inconceivable to the mind and so can be known a priori) and matters of fact (i.e. the opposite is conceivable and so can only be known a posteriori).

Question 48

Hypothetical imperative

Answer 48

A statement about what you should do if you want to achieve a certain outcome. For example, “you should leave now if you want to get to the station in time”.

Question 49

Idealism

Answer 49

The view that there is no such thing as a mind-independent external world and that what we perceive are mind-dependent ideas.

Question 50

Indirect realism

Answer 50

The view that a mind-independent external world exists, but that we perceive it indirectly via sense data. This sense data is caused by and represents the mind-independent external world.

Question 51

Inductive argument

Answer 51

An argument where the premises support the conclusion, but don’t logically guarantee it. An inductive argument will give good evidence to support its conclusion, however, unlike a deductive argument, does not logically guarantee its conclusion.

Question 52

(Leibniz’s law of) Indiscernibility of identicals

Answer 52

The principle that if A and B are the same thing, then A and B must have all the same properties. In other words, if two things have different properties, then they can’t be the same thing.

Question 53

Infallibilism

Answer 53

The definition of knowledge as true belief that is certain. According to infallibilism, anything that can be doubted is not knowledge.

Question 54

Innatism

Answer 54

The view that there is some (propositional) knowledge that we are born with. Plato, for example, argues that humans have innate knowledge of geometry and attempts to show this with his slave boy example.

Question 55

Intentionality

Answer 55

The ability of mental states to be about or directed towards a subject.

Question 56

Interactionism

Answer 56

A form of dualism that says that the mental and physical can interact in both directions.

Question 57

(Rational) Intuition

Answer 57

The ability to know something is true just by thinking about it. It is an a priori method of gaining knowledge.

Question 58

Invalid argument

Answer 58

An argument where it’s possible for the premises to be true but the conclusion be false.

Question 59

(False) Lemma

Answer 59

A (usually minor) premise in an argument. A false lemma is thus a false premise in an argument.

Question 60

Maxim

Answer 60

A rule or law that you follow. For example, “not to steal”.

Question 61

Moral realism

Answer 61

The metaethical view that that mind-independent moral properties (e.g. good, bad, right, and wrong) and facts exist objectively.

Question 62

Moral anti-realism

Answer 62

The metaethical view that that mind-independent moral properties (e.g. good, bad, right, and wrong) and facts do not exist objectively.

Question 63

Multiple realisability

Answer 63

Something is multiply realisable if there are many different things it can be. The claim that mental states are multiply realisable presents a challenge for behaviourism and type identity theory:

Mental states can be realised through many different behaviours, which is a problem for the behaviourist claim that mental states are behavioural dispositions. For example, someone in pain may say “ouch!”, but they may not if they don’t want to look like a wimp.

Against type identity theory, mental states can be realised by many different physical things. For example, a human, an octopus, can all feel pain but they each have physically different brains.

Question 64

(Moral) Naturalism

Answer 64

The metaethical view that moral judgements express cognitive statements and that these cognitive statements are true or false in virtue of natural properties.

For example, “murder is wrong” is true because “wrongness” is some natural property of the act of murder (e.g. it causes pain).

Question 65

Naturalistic fallacy

Answer 65

G.E. Moore’s phrase for the alleged philosophical mistake of reducing moral properties (e.g. good) to natural properties (e.g. pleasure).

Question 66

Necessary condition

Answer 66

A condition that something must meet to be part of a concept. In other words, if anything that does not have this condition it will not be part of that concept. For example, “unmarried” is a necessary condition of “bachelor” because you have to be unmarried to fit the concept of a bachelor.

Question 67

Necessary truth

Answer 67

Something that must be true (in all possible worlds). For example, “1+1=2” and “it is impossible for both a and not a to be true” are necessary truths because there is no possible world in which they are false.

Question 68

(Moral) Nihilism

Answer 68

The view that moral values do not exist and thus there is no reason to justify or condemn behaving in one way over another.

Question 69

Non-cognitive statement

Answer 69

Non-cognitive statements do not aim to describe how the world is and so are not capable of being either true or false.

Question 70

Ockham’s razor

Answer 70

The principle that if two theories have the same explanatory and predictive power, the theory that invokes the fewest entities is usually the better one. In other words, the simplest explanation is the best (all else being equal).

Question 70

(Moral) Non-naturalism

Answer 70

The metaethical view that moral judgements express cognitive statements and that these cognitive statements are true or false in virtue of non-natural properties.

For example, “murder is wrong” is true because the act of murder has the non-natural property of “wrongness”. Such moral properties are basic in that they cannot be reduced to anything simpler.

Question 71

Omnibenevolent

Answer 71

Perfectly good / loving, i.e. nothing can be more good.

Question 72

Omnipotent

Answer 72

Perfectly powerful, i.e. nothing can be more powerful.

Question 73

Omniscient

Answer 73

All-knowing, i.e. nothing more can be known by an omniscient being.

Question 74

Ontological reduction

Answer 74

If X ontologically reduces to Y, then X and Y are the same thing but “X” does not automatically mean the same thing as “Y”.

For example, although water ontologically reduces to H2O, it’s possible that someone could not know this: they might know the proposition “there is water in the lake” and yet not know “there is H2O in that lake” because the meaning of these two propositions is different.

Question 75

Phenomenal knowledge

Answer 75

Knowledge of qualia is sometimes called phenomenal knowledge – i.e. knowledge of what it is like to have a certain experience.

Question 76

Phronesis

Answer 76

An ancient Greek word used by Aristotle to describe practical wisdom. Someone who has phronesis possesses virtues that provide a general understanding of good that enables them to think through, understand, and act virtuously.

Question 77

Physicalism

Answer 77

The view that everything is physical or supervenes on the physical (e.g. properties and events supervene on the physical).

Question 78

Prescriptivism

Answer 78

The metaethical view that moral judgements express (non-cognitive) prescriptive instructions that primarily aim to guide behaviour.

For example, according to prescriptivism, “murder is wrong” means something like “don’t murder people!”.

Question 79

Propositional knowledge

Answer 79

Knowledge that something is true. For example, “I know that London is the capital of England.”

Question 80

Qualia

Answer 80

The subjective qualities of experience – i.e. what something feels like inside your mind. Qualia are not properties of objects themselves, but properties of our experience of objects. Examples of qualia include the redness of my experience when I look at a ripe tomato and the taste I experience when I drink beer.

Question 81

Rationalism

Answer 81

The view that there are some synthetic truths that can be known purely through a priori means. For example, Descartes’ cogito argument attempts to prove the synthetic truth “I exist” using thought alone and without reference to the external world.

Question 82

Realism

Answer 82

Realist theories claim that certain kinds of mind-independent entities exist. In metaethics, for example, moral realism claims that mind-independent moral properties exist. And in knowledge from perception, direct realism and indirect realism claim that mind-independent objects exist.

Question 83

Reliabilism

Answer 83

The definition of knowledge as true belief informed via a reliable method. For example, if I have good eyesight and see a car in the distance, my true belief “that’s a car” is knowledge according to reliabilism because it is informed via a reliable method (my eyesight).

Question 84

(Global) Scepticism

Answer 84

A belief that it is impossible to know anything because of the possibility of global sceptical scenarios. Global sceptical scenarios undermine our ordinary justifications and thus cast doubt on all our ordinary knowledge.

Question 85

(Local) Scepticism

Answer 85

A belief that it is impossible to know anything within a particular area. For example, you might be a theological sceptic in which case you believe it is impossible to know anything about God’s existence or character, or you might be a moral sceptic and believe it is impossible to acquire knowledge of moral truth.

Question 86

Solipsism

Answer 86

The view that your own mind is the only thing that exists.

Question 87

Sound argument

Answer 87

A valid argument with true premises (and thus a true conclusion).

Question 88

Sufficient conditions

Answer 88

Conditions that, if all are met, guarantee that something is part of a concept.

Question 89

Spatial order

Answer 89

Examples of organisation/order within the universe. For example, an eye is a complex organisation of matter that enables vision.

Question 90

Supervenience

Answer 90

X supervenes on Y if a change in Y is necessary for a change in X. This is mainly relevant in the discussion of property dualism: Property dualism says mental properties do not supervene on physical properties and so it is possible for two physically identical things to have different mental properties.

Question 91

Synthetic truth

Answer 91

A proposition that is true in virtue of how the world is. For example, “grass is green” or “water boils at 100°c”. Unlike an analytic truth, denying a synthetic truth does not lead to a logical contradiction.

Question 92

Tabula Rasa

Answer 92

Latin for “blank slate”. It is how Locke describes the mind at birth. Instead, knowledge comes from two types of experience:

• Sensation: Our sense perceptions – what we see, hear, smell, taste, etc.
• Reflection: Experience of our own minds – thinking, wanting, believing etc.

Question 93

Tautology

Answer 93

A statement that says the same thing twice and thus is trivially true. For example, “red is red”.

Question 94

Temporal order

Answer 94

Examples of organisation/order of the laws of the universe. For example, the laws of gravity and electromagnetism are examples of temporal order because if they were different life would not be able to form within the universe.

Question 95

Theodicy

Answer 95

An explanation of why an omnipotent and omnibenevolent God would allow the existence of evil. In other words, a theodicy is a response to the problem of evil.

Question 96

Tripartite definition of knowledge

Answer 96

The definition of (propositional) knowledge as justified true belief.

Question 97

Type identity theory

Answer 97

The view that mental states are identical to (ontologically reduce to) brain states. For example, type identity theorist might say that the mental state of pain is identical to c-fibers firing.

Question 98

(Act) Utilitarianism

Answer 98

The ethical theory that happiness is good and that morally correct actions are those that maximise happiness and minimise pain.

Question 99

(Rule) Utilitarianism

Answer 99

The ethical theory that happiness is good and that we should follow general rules that maximise happiness and minimise pain (even though there may be specific instances where following these rules does not maximise happiness).

Question 100

(Preference) Utilitarianism

Answer 100

The ethical theory that morally correct actions are those that maximise people’s preferences.

Question 101

Valid argument

Answer 101

An argument where if the premises are true, the conclusion must also be true.

Question 102

Value judgement

Answer 102

A statement about whether something is good, bad, right, or wrong.

Question 103

Verification principle

Answer 103

A.J. Ayer’s claim that a statement can only be meaningful if it is either an analytic truth or empirically verifiable.

Question 104

Via negativa

Answer 104

The view that the only way to accurately describe God is to describe what God is not. For example, rather than describing God as ‘powerful’, the via negativa would say God is ‘not weak’.

Question 105

Via positiva

Answer 105

The view that we can describe in positive terms what God is. For example, we can describe God as ‘good’ and ‘powerful’ rather than simply ‘not evil’ and ‘not weak’.

Question 106

Virtue epistemology

Answer 106

Definitions of knowledge that invoke intellectual virtues. Intellectual virtues are things like caring about the truth and thinking rationally. Zagzebski’s definition of knowledge, for example, says knowledge is belief that arises from an act of intellectual virtue.

Question 107

Virtue ethics

Answer 107

Ethical theories that focus on what a good person is rather than what good actions are. For example, Aristotle’s ethics talks about virtues and vices of character and how this relates to being a good person and achieving eudaimonia.

Question 108

(Philosophical) Zombie

Answer 108

A being in another possible world that is physically identical to an ordinary human in every way but lacks qualia. For example, the zombie version of you would have exactly the same brain states and behaviours as you but would not have the corresponding phenomenal experience/qualia.