No, it is not true. A scientist can use many methods at the same time to investigate. The important thing is to eventually discard what doesn't work, and to refine what appears to work, or which can be 'proven' to work. Basically, it is all in being able to prove that the results actually work as expected, and that the results can be confirmed time after time when the experiments are repeated.
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This is true because if any bias is present, the outcome may be affected by the scientist's method.
True.
False
A. True
False