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Neither is Praxeology (
http://en.wikipedia.org/wiki/Praxeology) but it is most certainly a science. The root goal of science is to be able to develop theories of the natural world, with the goal of making predictions. As with anything outside of the hard sciences, it's very difficult or impossible to make a controlled test of a hypothesis; this does not mean that a well formed theory cannot be used to make effective predictions. Praxeology is damn good at making predictions. Other social sciences have varying degrees of usefulness in this regard.
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Would Praxeology really have forecast that after 5 years of quantitative easing, inflation would be a thing of the past and deflation our main danger? My recall was that in 2010 the Austrians were predicting hyperinflation.
http://www.hyperinflation-us.com/Yet now inflation is a distant memory:
http://coppolacomment.blogspot.com.au/2013/05/inflation-deflation-and-qe.htmlI don't mean to pick on Praxeology. I just think that things like politics, economics and sociology can never be sciences in the "the is a correct answer" sense.