Angie did the following proof in her logic class. Which step in the indirect proof did she do incorrectly?

Prove: 12 is divisible by 6.

Step 1: Assume that 12 is not divisible by 6.
Step 2: 2 times 6 is equal to 12. 12 divided by 6 is 2.
Step 3: 12 is not divisible by 6.
Answer
Step 1
Step 2
Steps 1 and 2
Step 3

Question

Angie did the following proof in her logic class.  Which step in the indirect proof did she do incorrectly?
 
Prove:  12 is divisible by 6.
 
Step 1: Assume that 12 is not divisible by 6.  
Step 2:  2 times 6 is equal to 12. 12 divided by 6 is 2.
Step 3:  12 is not divisible by 6.
Answer
		Step 1
		Step 2
		Steps 1 and 2
		Step 3

directrix · Answer

Step 3:  12 is not divisible by 6.

After showing a contradiction of the assumption that the conclusion is not true (step 2), the third step concludes with a statement that the conclusion is indeed true. In that respect, it is a restatement of what was to be proved indirectly.