3. Logical Positivism Flashcards
Q: Who were the logical positivists and where did they originate?
A: Logical positivism emerged in Vienna in the late 1920s, primarily through the Vienna Circle, a group of physicists, mathematicians, and philosophers who gathered to discuss the implications of major scientific revolutions, especially those triggered by Einstein’s work.
Q: Why did logical positivism arise?
A: Logical positivism arose as a reaction against the prevalent style of German philosophy, which was characterized by obscure and difficult writing. The Vienna Circle members doubted whether such writing conveyed any meaningful content and attributed many scientific confusions, particularly in social and behavioral sciences, to unclear language.
Q: What was the main goal of the logical positivists?
A: The main goal of the logical positivists was to construct a universal and intersubjective language for science, separating meaningful sentences from meaningless ones. They aimed to eliminate metaphysics, which they considered unverifiable and beyond human experience, from scientific discourse.
Q: What are pseudowords and pseudostatements according to Rudolf Carnap?
A: Rudolf Carnap argued that a sequence of words is meaningless if it does not constitute a statement within a specified language. He criticized metaphysics for being filled with pseudowords (words mistakenly thought to have meaning) and pseudostatements (meaningful words arranged syntactically incorrectly, resulting in meaningless statements).
Q: What examples does Carnap provide to illustrate pseudowords?
A: Carnap provides examples like “teavy” (a word with no empirical criteria for application), “toovy” (a redundant synonym for an existing word), and “principle” in a metaphysical sense (lacking clear empirical criteria). These demonstrate how words can be meaningless if they don’t correspond to observable criteria.
Q: What constitutes an ill-formed syntax and a category mistake in logical positivism?
A: An ill-formed syntax involves logically unsound arrangements of words, such as “Caesar is and,” which are meaningless despite using real words. A category mistake occurs when a word is applied inappropriately, as in “Caesar is a prime number,” which is syntactically correct but meaningless because “prime number” is a predicate of numbers, not people.
Q: How does logical positivism classify sentences to determine their meaning?
A: Logical positivism classifies sentences as:
True by virtue of their form (e.g., “2 + 2 = 4,” analytic statements).
False by virtue of their form (e.g., “2 + 2 = 5”).
Empirical statements or protocol sentences (e.g., “The height of this table is 100 cm”), which can be empirically verified.
Q: What are theoretical statements (T’s) and how are they verified?
A: Theoretical statements (T’s) are those not based directly on observations, such as the theory of gravity. They are meaningful only if observable deducible observations (O’s) follow from them. For example, the theory of gravity predicts that objects will fall towards Earth, which can be empirically tested.
Q: What is the verification principle in logical positivism?
A: The verification principle asserts that a statement is meaningful only if it can be empirically verified. This means that for a theoretical statement to be meaningful, it must lead to observable consequences. If no observable outcomes follow from a statement, it is considered meaningless in a scientific context.
Q: Why is logical positivism considered a theory of meaning rather than a theory of science?
A: Logical positivism is considered a theory of meaning because it focuses on constructing a logical language for science that distinguishes between meaningful and meaningless statements. It aims to clarify the language used in science rather than developing scientific theories themselves.
Q: How did logical positivists view scientific theories as axiomatic structures?
A: Logical positivists viewed scientific theories as axiomatic structures built on fundamental principles (axioms) and primitive terms. From these axioms, specific laws could be derived, similar to Newton’s mechanical theory, which provides laws about motion and gravity. This approach aimed to unify all branches of science into a cohesive framework.
Q: What was Carnap’s view on psychology as a physical language?
A: Carnap believed that psychology could be conducted in an intersubjective and universal way without invoking unobservable properties like consciousness. He argued that all sentences in psychology describe physical occurrences, specifically the physical behavior of humans and animals, making psychology a testable science through observable phenomena.
Q: How did Carnap propose ensuring the translatability of psychological language into physical language?
A: Carnap proposed that for psychology to be translatable into physical language, every psychological expression must have a definition that can be directly or indirectly derived from physical expressions. This ensures that psychological statements can be empirically verified and formulated in a physical language.
Q: What did Carnap mean by “sentences about other minds”?
A: Carnap used the concept of “sentences about other minds” to illustrate how psychological statements should be reducible to physical observations. He argued that statements about mental states should be describable in terms of physical behavior and physiological responses, avoiding the invocation of unobservable occult properties.
Q: Why did logical positivists consider introspection to be of no special status?
A: Logical positivists viewed introspection as protocol sentences that describe one’s own mental states. However, these introspective statements were not considered to have any special epistemic status because they lacked intersubjective verifiability, unlike physical observations that could be empirically tested and verified by others.
