a software engineer, a phycisist and a mathematician were put in charge of a technical matter: the lights were out in a room.
first in went the engineer. he hit the switch, but nothing happened. "it must be a hardware failure" he thought, shrugged, and walked away.
then in came the phycisist. hit the lights, observed no light. but because he had some deductive capabilities, he thought the problem must be a broken lightbulb. he changed it, but the lights still stayed out. he shrugged, and walked away.
last in came the mathematician, hit the lights as all the others. surprisingly, nothing. he concluded it must be the lightbulb, and went on to change that. the room stayed dark. he wasn't satisfied, so he deduced that if not in the lightbulb, then the problem must lie in the fuse box. he went on to check the fuses, and sure enough, there was a broken one indeed. the mathematician closed the fuse box, and walked away extremely happy, because the solution did indeed exist!
A chemist, a physicist and an engineer were asked to consider the proposition: All odd numbers are prime.
Chemist, 1 sort of, 3, yes, 5 yes, plot the graph: they're all prime
Physicist: 1, sort of, 3 -yes, 5-yes, 7-yes, 9 -no, 11- yes: plot the graph, just one outlier, so yes, they're all prime
Engineer: 1 sort of, 3-yes, 5-yes , 7-yes, 9- yes : I guess they're all prime