I agree that's wishy washy and I don't know the motives of David Deming
, why he stopped at 50%. Perhaps for health reasons? On the other hand he may also feel unable to live with a secret like that.
Anyway, it is a fact that against all the evidence and without any incentive that the Medieval Warming Period
was declared death shortly after that:
While the evidence for a warm MWP is accumulating every day.