If I had said that, it would be a tautology, but it would not be nonsense. Clearly, for a phenomenon to be Santa-istic, it requires a beard and a red suit. Parenthetically, let me assure you that there exist men with red suits and beards for which no claim of santahood is being made, and non-supernatural santas sans red beard and suit. Your claim is spurious, and my experiment is genuine, to the same extent as yours. It is quite conceivable that I might very well fail at the attempt to build an artificial santa in the sears lobby, thereby, according to your rules, casting doubt on the existence of a non-supernatural santa over at monkey-wards. Maybe that really is a supernatural santa over at monkey wards--maybe life really is the product of supernatural intervention.
No supernatural claims are made by my assertion.