Good science starts from the body of evidence we already know, creates a plausible hypothesis, and then tests that hypothesis to see whether it can be disproven.

We don't say "hey, maybe gravity isn't real so to be unbiased I need to assume it's not and test every other possibility before determining what keeps making these bricks fall on my head every time I throw them up in the air"

No need to reinvent the wheel for every experiment.

Gotta do it in random order.