The final goal of Philosophy is the unfoldment of the Ultimate Truth. Philosophy normally provides an intellectual coviction which falls short of the direct realisation of Absolute Truth.
Vedanta is not a science which deals with intellectual abstractions, even though intellectual abstractions from the basis of all philosophy.
If Vedanata is the Science of Being, then Yoga is the Art of Living. Intellectual conviction alone is not necessary for Self Actualisaton. An aspirant has to undergo rigorous Yogic sadhana to arrive at Truth, under the guidance of a bona fide Divine Master, who himself has undergone the inner war and actualised Truth within himself.