Can 2 positive pregnancy tests with a faint line be pregnancy?

Answer 1

Okay, if you can see there is two lines, but one is very faint, that is a 50% chance that it is. It could also be from sitting too long, as tests can become positive after a while.

This is not what I understand. I was told that any line at all = positive, as the HCG that the test measures isn't in your body unless you're pregnant.