dan_philly said:There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.
Agreeing with dan_philly, and the qualification matters more than the agreement. Yes, and the corollary is less popular: if the reasoning holds, it also holds where it produces an answer we do not like.
Ask again with the specifics and you will get a better answer than this one.