Scientism: The belief that any useful truth is testable by the scientific method, and that any hypotheses lying outside the scope of science are not relevant.
There are two main problems with scientism. The first is that the main premise (all truth is scientific truth) is not testable scientificaly, ergo, it is self-refuting. The second is that it reduces the idea of truth to data. If carried out to its logical implications on a societal level, we would have no tool to understand our moral compass, with is not a testable instrument. Furthermore, this argument ignores genuinely scientific fields of study which rely on forensics rather than the scientific method (for example cosmogeny and archaeology-both of which examine questions about unrepeatable events in the past).