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2 cards from this section. Quick, good the night before a test.
Define a valid argument.
Think of the logical structure connecting premises to conclusion.
What is a tautology?
Consider an example of a statement that cannot be false.
Which statement is true about valid arguments?
Think about what it means for an argument to be sound.
A tautology is:
Remember the definition of a tautology.
Given the premises 'If today is Monday, then it’s raining' and 'It’s Monday', what can you conclude?
Use the principle of conditional statements.
Consider the argument: 'All cats are animals' and 'Whiskers is a cat', validate the conclusion that 'Whiskers is an animal'.
Examine the premises carefully to see how they relate.
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