Five things people say, which are patently untrue:
1. A watched kettle never boils. (I watched one just the other day and it boiled. QED)
2. It's not the winning but the taking part that counts. (Tell that to Paula Radcliffe)
3. Every cloud has a silver lining. (Clouds are made of water droplets or ice particles.)
4. Too many cooks spoil the broth. (Too much salt spoils the broth)
5. The early bird catches the worm. (Maybe, but it's the second mouse that gets the cheese.)