OK. What lies would save you years of life if someone smacked you and debunked them?
For me:
1) Women are romantic
2) 5 percent of people are retarded. (it's about 60 in my opinion)
3)it's hard to lose weight
4) teachers know what they're teaching
5) (my lie) wisdom doesn't exist

Please, feel free to add lies that wasted years of your life aswell.