So your point is that we can't be rational unless we assume, without evidence, that there is a source of rationality in the universe. I don't quite see the logic that goes behind it. Maybe if you supported your claim with evidence rather than just asserted it you might make more sense.
You have not stated tyhe case precisely. We can not be rational unless the universe is rational. The specious notion that human reason can escape the laws of the universe is the particular conceit of those who can not accept a rational universe.
"So your point is that we can't be rational unless we assume, without evidence, that there is a source of rationality in the universe. I don't quite see the logic that goes behind it. Maybe if you supported your claim with evidence rather than just asserted it you might make more sense."
I think he might be saying that causality must have a beginning. It couldnt have started in man because man is finite, or because man did not come before all else.