Revision Flashcards
0
Q
What is a contradiction?
A
A contradiction is a proposition that is always false.
1
Q
What is a tautology?
A
A proposition that is all true
2
Q
What is a contingency?
A
A contingency is a proposition that is sometimes true and sometimes false.
3
Q
Premise markers:
A
Because Since As But And
4
Q
Conclusion markers:
A
So Therefore Thus It follows that ...because
5
Q
Antecedent markers:
A
If When Provided that Given that Because Whenever Is necessary for Assuming that On condition that
6
Q
Consequent markers:
A
It is sufficient for Implies Guarantees that Only if As a result Then
7
Q
Since the values in the M.C. are:
- tautology=
- contradiction=
- contingency=
A
A tautology= …are all true, the formula is a tautology
A contradiction= …are all false, the formula is a contradiction
A contingency= …are both true and false, the formulas a contingency
