Notes

Question 1

Things to keep in mind about true/false (2)

Answer 1

Same as boolean algebra in CS - so or is inclusive
De morgan’s laws

Question 2

What is a statement

Answer 2

• Can be either true or false but not both
• Can be combined to make “bigger statements”

Question 3

The statement if A then B means

Answer 3

• If A is true, then B is true.
• If A is false, then B may be either true or false.
• if A then B is equivalent to not A or B.

Question 4

Statement of the form
A only if B

Answer 4

Statements of the form A only if B are logically equivalent to statements of the form if A then B

Question 5

Statement of the form
A if and only if B

Answer 5

A and B are equivalent - both true at same time, and both false at same time