Facts are pesky things, aren't they? 
They are when they're really facts. In this case the fact is the economic stats, but the causation and correlation to the tax change are just inferential. Both sides of economic arguments are fond of slinging stats around, completely isolated from cyclic considerations, world events, or tech developments. I think IN GENERAL a tax cut has a favorable effect on economic activity, but at some level there is a flex point and it works the other way because economically-supportive services the government provides begin to degrade, but nobody really knows for sure where that point is.
