system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can someone please explain to me the "multiple comparisons fallacy?"

I want to understand it more thoroughly.

Note: A fallacy is an error in reasoning.
gpt
News reporting on science is hampered by the fact that most reporters are not trained scientists, largely because most scientists have jobs that pay more than all but a very few journalists.

When there are a bunch of scientific studies, a scientist knows there are many studies.  To report that in the news, reporters want to tabulate them to make their story about 1-3 things rather than many because such stories are understood by many more readers.  This tabulation, though easy to understand, is often a fallacy.

If reality is "Out of N studies, A produced result X and B produced result Y."

Tomorrow’s headlines read, “Studies show Y”.