In a lot of fanfiction, I see Liquid written a bit gullible... which I suppose isn't an unfair assumption to make about him... but I feel as if it's wrong. His philosophy is misguided and silly and totally pseudoscientific even for the time, but it's something that was drilled into him over a long period, he didn't accept it on a whim. Even if he did learn the truth, his feelings of inferiority went further than just his "genetics" rants... in the end, the matter of dominant and recessive genes was just a vehicle he used to justify his feelings. He'd still be just as bitter if he found out he was lied to, I think...
On the other hand, airhead Liquid is really really good gap moe. I want a long impassioned villain speech from a man who'd turn around if I pointed and said "look over there!!!"....... so I let it slide.....