The truth tends to always come out, so make your point, make sure the people who needs to hear it hear it, and let the others believe what they want. Just keep

The truth tends to always come out, so make your point, make sure the people who needs to hear it hear it, and let the others believe what they want. Just keep quiet and humble, and when the truth comes out and they realize it, watch and savor. No "I told you so" and such, just watch and savor. On the one hand, it's hard to keep quiet when you think you're right, but on the other hand, it actually takes less effort than trying to convince a fool.