Student of Philosophy doesn't add Intelligence bonus to Perception and Bluff

Hi everyone, I noticed that the feat "Student of Philosophy", found in "Pathfinder Player Companion: Quests & Campaigns", doesn't add the intelligence bonus.

The perception for "Gather Information" and the bluff for "Feint in combat" can be treated as another skill without the intelligence bonus (Since these skills are not covered in the trait)?

I attached a character for testing purposes.