Well to sum it up they’re not just your average guys, and to add to that, they’re kind of like a calculator, you can pretty much always count on them.

Psychologist: not at all, it's a standard deviation.

Because he only ever takes sum of the numbers!

So he asks them a simple question: "How much is 1+1?"

The mechanical engineer quickly opens a handbook and say, the handbook says 2, let's make it 3 just in case.

The physicist starts scribbling and after 5 minutes say it's between 1.95 and 2.05 within 3 sigma confidence level.

...

The mechanical engineer quickly opens a handbook and say, the handbook says 2, let's make it 3 just in case.

The physicist starts scribbling and after 5 minutes say it's between 1.95 and 2.05 within 3 sigma confidence level.

...

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