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A comment on Marshmallow Test Fails to Replicate. Parent comment
Proving a known hypothesis or deciding what you want to know after the fact are completely different methods.
> Did you cast some ancient spell when you came up with the hypothesis or something?
"I'll know it when I see it" is an incredibly vague way of doing science that requires extra rigor somewhere else to compensate.
Or, in a more rigorous explanation, testing for multiple hypothesis is subject to that kind of failure:
https://xkcd.com/882/
So you need more data confirming your theory.
But if you state your single hypothesis beforehand, you are at the situation of the top square, with a high-confidence result.
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Proving a known hypothesis or deciding what you want to know after the fact are completely different methods.
> Did you cast some ancient spell when you came up with the hypothesis or something?
"I'll know it when I see it" is an incredibly vague way of doing science that requires extra rigor somewhere else to compensate.
Or, in a more rigorous explanation, testing for multiple hypothesis is subject to that kind of failure:
https://xkcd.com/882/
So you need more data confirming your theory.
But if you state your single hypothesis beforehand, you are at the situation of the top square, with a high-confidence result.