One of the biggest things about the "harder" sciences is that there's usually a whole engineering discipline behind them as well. Nothing reproduces a result as

One of the biggest things about the "harder" sciences is that there's usually a whole engineering discipline behind them as well. Nothing reproduces a result as effectively as a host of engineers building real things on the back of it. If it doesn't work, we'll find out pretty soon, and if it does work then we'll have lots of evidence to show it. The problem with results like "ego depletion" is that their utility is fuzzy at best. With no clear application, we don't have a body of practical results using it.