Science is based on philosophy, therefore, philosophy is essential in determining truth and knowledge. People often claim that all that is needed is science.
The scientific method of science is a philosophical construct, using epistemology to determine the nature of truth and knowledge, and how to prove things.
Other aspects of reality (or of claimed reality) fall under the category of religion and spirituality; but these should be evaluated via philosophy. Usually, these are considered as revealed knowledge from God. But revealed religions and revealed spiritual paths are untrustworthy sources of truth and knowledge: they require philosophical evidence to back them up. (And also, they should not contradict science.)