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It is more like trial and error. They make the experiment more accurate by the correct measurements and making sure they are using the correct equipment. When something goes wrong they simply repeat the experiment, to make the experiment improve.

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10y ago
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9y ago

Run it again and again, double check it again and again and have others run the same experiment.

It's difficult for a single scientist to make sure the results aren't a mistake (if the instrument used is miscalibrated, just running the experiment again may well give the same incorrect results; also, if the scientist habitually forgets to clean out the glassware from the last experiment, this could cause the results to be wrong even if the scientist uses a second instrument that is properly calibrated), but the scientific community as a whole can.

This is called "reproducibility" and is a goal for all experiments. It shouldn't matter so much who's doing the experiment or where they're doing it or who manufactured the equipment used. The important thing is that other scientists in other labs using other equipment get the same results. At that point you can be reasonably sure that the results are not a mistake ... though the interpretation still may be.

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7y ago

repeat the experiment

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Q: How can a scientist make sure that the results of an expiriment are not a mistake?
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