Hello,

I'm not liking "assumed/presumed here", even though I see lots of ghits for "known and presumed information." There reason why is because of the context. This is language used during a scientific experiment, and that alone changes things for me. So, in this context, I'd prefer: estimated vs factual information.

In law and law enforcement, you often see "presumed and known information" , but not as much in purely scientific one (you do see it, but not a lot, in my humble opinion). I also see "estimated and factual information" quite often in math, economics and financial contexts.

I don't know why you couldn't say "information" instead of "data" here.

I hope this helps, Victoria.