[D] How often is results (or data) manipulated in research papers?

I recently came across the Harvard Professor's results manipulation case and found it amusing that how can people fake results on such a higher level. Is this something what happen in ML Research as well? I've never been a first author of a ML paper so I don't know how things work at reputed conferences but I don't think someone cross checks the results, but only raise issue if they find it suspicious.

Sometimes I have found results not matching …

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