Question 637226: Identify which argument is invalid.
If I sing in the shower, then I will not be overheard while singing.
I did not sing in the shower.
Therefore, I was overheard while singing.
If Sally is on vacation, then Tom is at work.
Sally is on vacation.
Therefore, Tom is at work.
Either Sally is on vacation or Tom is at work.
Sally is not on vacation.
Therefore, Tom is at work.
If Jan gets lost, she will need a map.
Jan got lost.
Therefore, Jan needs a map.
If I shower in the morning, then I do not smell bad.
I smell bad.
Therefore, I did not shower in the morning.
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
If I sing in the shower, then I will not be overheard while singing.
I did not sing in the shower.
Therefore, I was overheard while singing. 
Given If p then q, not p, you can determine nothing about q.
If Sally is on vacation, then Tom is at work.
Sally is on vacation.
Therefore, Tom is at work. 
Either Sally is on vacation or Tom is at work.
Sally is not on vacation.
Therefore, Tom is at work. 
If Jan gets lost, she will need a map.
Jan got lost.
Therefore, Jan needs a map.
If I shower in the morning, then I do not smell bad.
I smell bad.
Therefore, I did not shower in the morning. 
John
My calculator said it, I believe it, that settles it
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