Chapter R.1, Problem 1PE

Using the names of property from Exercise 11, identify the property illustrated by each statement: a If 12, then 21. b If 12, 23, and 34, then 14. c 11.

Let P represent any statement. Classify as true or false. a P and P b P or P

Label each of the following statement as either true or false. 9. If ab and ba then a=b.