When must scientist conduct controlled experiments?

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asked May 8, 2016 67.8k views

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Dieter Pisarewski · Answer 1 · 2016-05-13T17:57:18+0000

A scientist must conduct a controlled experiment whenever he wants
results that are significant, meaningful, and helpful. If the experiment is
not controlled, then he is just playing around.

When must scientist conduct controlled experiments?

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