Scientists often investigate alternative explanations for the data and observations presented, even once a hypothesis has been tested and supported through an experiment. this investigation of alternative explanations

Strengthens the evidence and support for a scientific theory.

Explanation:

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Scientific method provides a compelling tool scientists use to both develop and demonstrate new theories. As it involves both the observation and experimentation towards a specific subject of matter, it turns out convenient to consider alternative explanations substantiating such subject of matter in light of obtaining a more precise explanation for it. In such a way, this investigation of alternative explanations strengthens the evidence and support for a scientific theory.

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that's what i got you can count the number of atoms