Passage Summary: Humans have special brain powers that animals don't, and the argument claims that once we realize we have them, we can't be happy unless we are using them.

Conclusion: Once humans recognize their superior cognitive faculties, they can only achieve happiness through the gratification of those specific faculties.

Reasoning: Human beings possess cognitive abilities that are more advanced than those of other animals.

Analysis: The argument sets up an incredibly high bar for human happiness, claiming it is impossible to be happy without satisfying these 'superior' faculties. To weaken this, we should look for a counterexample where someone is aware of their intellect but finds genuine happiness in simple, non-cognitive pleasures. Perhaps there are people who know they are smart but are perfectly content just taking a nap or eating a good meal. If happiness can exist independently of these faculties, the author's absolute claim falls apart.