If you admit you're wrong and make changes to whatever it is that you're wrong about, people will respect and appreciate you more.
Unfortunately this requires the swallow_ego.pill patch installed. Without this you will be incapable of being a civil person.
When someone says something true, say “you’re right”, not “i know”. It’ll make them feel better and you’ve still shown everyone how awfully clever you are.
Vaccines don't cause autism, nor do they contain elemental aluminum or mercury.
It's significantly more effective to prevent cancer than it is to treat it, but the world isn't interested because most people just want a pill to fix their problems.
Don't smoke. Wear sunscreen. Don't drink excessively. Get a bit of exercise and eat some goddamn vegetables. Do those and bam!, huge drop in cancer risk, but nobody wants to hear it.