Really? Can you show me multigenerational studies which compare the scores on standardized tests? Can you show me generational studies if the record times of marathon runners? I think you are either being a bit sloppy with your 'facts' or else you are making things up. Neither wishful thinking nor truisms should be confused with established fact.
Actually try googling the definition of scientific fact to start. Then try scientific theory and also hypothesis. It seems clear to me that you do not understand any of these.
Well, you try googling. I suggested the definition of a scientific fact vs a fact fact is nonsensical. Later I proposed the definition that a "scientific" fact could be a fact predicted by a scientific theory. A theory is right when it makes accurate predictions and wrong if it fails to do so.
I know what are called Scientific Theories (with caps). They are the generally accepted theories. Evolution is a fact; the Theory of Evolution is falsifiable. It could be disproved if it were wrong. String Theory is NOT a Scientific Theory -- it is still a plausible hypothesis. Inflation Theory is not yet a Scientific Theory, but it is the most accepted one in the physics community.
As for the multigenerational studies, see any competent literature. I happen to have studied up on this area. IQ is correlated with the IQ of parents. Try reading the studies yourself. Perhaps my data (about 20 years old) is no longer valid and I must change position. But when I looked the correlation was high. It could be nurture, of course. Children of musicians are often good musicians. Inborn talent? Nurture alone? Some mix? It has been shown that scores on IQ tests can be improved by practice. IQ is not fixed. What IQ measured, initially, was the ability to take standardized tests. Later IQ tests were "normalized" so as to agree with predecessors.
When it comes to biology, I am no more educated than the average professor of computer science. So I read all of Dawkins' books. Evolutionary Theory explains how all characteristics of all species are inherited. It is not too much of a stretch to include some degree of propensity to violence in genetics.
ETA. Okay I googled it and found this...
"A scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing."
Why yes! That fits.
Now as to scientific fact we find...
"In the most basic sense, a scientific fact is an objective and verifiable observation, in contrast with a hypothesis or theory, which is intended to explain or interpret facts."
Why, yes! That is consistent with both my statements. Scientific facts are just verifiable facts; no adjective needed.
A scientific fact (as distinguished from a fact fact) is one that has been verified scientifically.
What else did you want me to look up and find what I myself said?