Several people were asked the following problem: Prove that
all odd integers higher than 2 are prime.
Mathematician: 3 is a prime, 5 is a prime, 7 is a prime,
and by induction  every odd integer higher than 2 is a prime.
Physicist: 3 is a prime, 5 is a prime, 7 is a prime,
9 is an experimental error, 11 is a prime,...
Engineer: 3 is a prime, 5 is a prime, 7 is a prime,
9 is a prime, 11 is a prime,...
Programmer: 3's a prime, 5's a prime, 7's a prime,
7's a prime, 7's a prime,...
Salesperson: 3 is a prime, 5 is a prime, 7 is a prime,
9  we'll do for you the best we can,...
Biologist: 3 is a prime, 5 is a prime, 7 is a prime,
9  results have not arrived yet,...
Advertiser: 3 is a prime, 5 is a prime, 7 is a prime,
11 is a prime,...
Lawyer: 3 is a prime, 5 is a prime, 7 is a prime,
9  there is not enough evidence to prove that it
is not a prime,...
Accountant: 3 is prime, 5 is prime, 7 is prime, 9 is prime,
deducing 10% tax and 5% other obligations.
Statistician: Let's try several randomly chosen numbers:
17 is a prime, 23 is a prime, 11 is a prime...
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