2-1 Conditional Statements Crossword

Across
5.	If you say a statement is false, you must provide this to prove it.
7.	How many chairs are in my room?
8.	What university did I first graduate from?
12.	The proper name for opposite (verb form).
14.	These type of statements come in "If-then" form.
15.	What the DG in Mr. D-G's name stands for?
16.	This is the symbol for "negate".
17.	A truth or rule that we accept without proof.
19.	This is the symbol for a conditional statement.
20.	This follows the "If" in a conditional statement.

Down
1.	How many children do I have?
2.	This changes the hypothesis and conclusion to their opposites.
3.	How many years I have been teaching.
4.	This makes the hypothesis and conclusion switch places.
6.	the proper name for the opposite (noun form).
9.	This switches and negates the hypothesis and conclusion.
10.	To prove a statement is true, how many cases must you use?
11.	This follows the "then" in a conditional statement.
13.	The name of this class.
18.	There is one poster in my room that tells you what to do. What does it say to do?