Science, since this is the only one that can actually be tested to find out if something is 'true'. Art and philosophy are subjective, so cannot determine what is 'true'. This is not to say they do not have value of course, just that their value is different and is in the eye of the beholder.

As a side note, have you ever been to the Tate Modern? The 'art' in there is bloody hilarious. There was one piece that was part of an air duct. I thought it was actually part of the air conditioning system that was being replaced, but no, apparently this is what passes for art nowadays ?

Where there is life there is a pattern, and where there is a pattern there is mathematics. Once that germ of rationality and order exists to turn a chaos into a cosmos, then so does mathematics. There could not be a non-mathematical Universe containing living observers.
John D. Barrow, The Artful Universe (1995)