I think you stumbled across a philosophical discussion, involving Hume, et al.

I subscribe to the philosophy of Dezcarties, who famously said, "I'm pink, therefore I'm spam".

Or something like that.

:-)

I comment on The Oil Drum, therefore I exist.

Yes, that was it ;-)

Commento, ergo sum

I'm a radical neo-cartesian and refuse to create any conclusions: I think. Therefore, I think.

There's a shorter name for that: Zen.
Or some might say, "bleedin' obvious"... but it is a surprisingly powerful concept that many people have forgotten about ;-)

"You can never solve a problem on the level on which it was created."
Albert Einstein

Actually, I was quite puzzled why someone would conclude a follower of Hume to be a PO denier. It is a cornucopian who would be more likely to be anti-Hume philosophically. For instance, one of Hume’s most significant findings is that inductive reasoning is invalid. No matter how often something occurs I cannot conclude it will always occur. I can only say something is statistically probable - more likely than not. Just because the sun comes up every day does not logically prove it will tomorrow. Sound familiar? The cornucopian believes since we have always had enough oil, and technology has always found it, it always will. The previous commenter has concluded (I’m sorry if I did not understand his argument) that someone who follows Hume cannot conclude anything about anything, when in fact it is healthy skepticism tempered with experience. I strongly suspect the writer has never read his treatises. His treatise on morals is particularly good. I may not be able to logically prove gravity exists, but I’m not about to jump out a 20 story window because gravity’s proof is invalid.