Question

Anyone know what ~p or ~q mean? P is for hypotosis and q is conclusion but what is ~

Answer 1

That symbol means "not"

Hypothesis (p): You have a library card.   Conclusion (q): You can check out books.

1) If you have a library card, then you can check out books.

⇒Conditional

2) If you canNOT check out books, then you do NOT have a library card

⇒Contrapositive

3) If you can check out books, then you have a library card.

⇒Inverse

4) If you do NOT have a library card, then you canNOT check out books.

⇒Converse

5) You have a library card if and only if you can check out books.

⇒Biconditional

**************************************

1. p → q

2. q → p

3. ~p → ~q

4. ~q → ~p

Answer 2

If it's for geometry' it is

~     means similarity same shapes, not same size

an example would be ... ∆ABC~ ∆XYZ