1) Even a child could do manual testing
Fact: Testing requires skills which a normal person cannot perceive!
2) Testers don't get along with programmers
Fact: Mostly programmers are irritated with testers finding more bugs and they think testers always hate them so its a vice versa
3) Testing has no scope
Fact: A tester can always be open to learn scripting, which would help in saving time while regressing the defect.
4) The product which is tested is bug free
Fact: Even a fully time experienced tester can miss certain minor bugs due to time constraint.
5) Testers are responsible for the quality of the product
Fact: Everyone in the team including designers, developers, managers are responsible for the product