Negation

This lecture explains our first logical operation: negation.

Takeaway Points

1. Negation is the “opposite” of a simple sentence. Whenever the simple sentence is true, its negation is false; whenever the simple sentence is false, the negation is true.
2. Negation statements are easy to identify because “not” almost always appears in them.
3. We use a tilde to express the negation. So the negation of W is ~W.

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