Shelly, Susan, and Samantha are all working at an amusement park for the summer. The manager finds out that one of them left the key in the door to the security office. When he asked them who did it, they replied:

Shelly: Susan did it.
Susan: I didn’t do it.
Samantha: Susan did not do it.

The manager concluded that Susan did it because she was accused and was denying it.

Use an indirect proof to show that the manager was wrong and that Susan did not leave the key in the security office door.

Question

Shelly, Susan, and Samantha are all working at an amusement park for the summer.  The manager finds out that one of them left the key in the door to the security office.  When he asked them who did it, they replied:
 
Shelly: Susan did it.
Susan: I didn’t do it.
Samantha:  Susan did not do it.
 
The manager concluded that Susan did it because she was accused and was denying it.
 
Use an indirect proof to show that the manager was wrong and that Susan did not leave the key in the security office door.

anonymous · Answer

Well, perhaps the manager is wrong because both Susan and Samantha say that Susan did not do it while only Shelly feels that Susan did it?

anonymous · Answer

2 against 1.

anonymous · Answer

Oh ok, I understand. :) thank you!

apoorvk · Answer

This is umpteenth time I am coming across Susan, Shelly and and Samantha on OS.