Sharky, a leader of the underworld, was killed by one of his own band of four henchmen. Detective Sharp interviewed the men and determined that all were lying except for one. He deduced who killed Sharky on the basis of the following statements:
a) Socko: Lefty killed Sharky.
b) Fats: Muscles didn't kill Sharky.
c) Lefty: Muscles was shooting craps with Socko when Sharky was knocked off.
d) Muscles: Lefty didn't kill Sharky.
Who killed Sharky??
I've set variables for each statement.
p - Socko Killed Sharky
q - Fats killed Sharky
r - Lefty killed Sharky
s - Muscles killed sharky
t - Muscles was shooting with Socko when Sharky was killed