true beyond a reasonable doubt, probably true, possibly true or possibly false

Question

You expect to get forty miles to the gallon in that? Why, that old wrech has a moster V8; besides, it's fifty years old and needs an over haul.

I think it is probably true.

Answer 1

There is a good possibility,with three negative statements, that beyond reasonable doubt would be a good answer.

Answer 2

http://www.unc.edu/depts/wcweb/handouts/fallacies.html
Read through a few of these listed at the right. This is probably a generalization of some sort.