Hacker News new | comments | show | ask | jobs | submit login

Correct, for example HotOrNot voting. If you eneter a profile url directly, you can vote but it would not be counted. If you are sent randomly to a profile(by selecting "next random" button), then there is no self selection bias and your vote is counted.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | DMCA | Apply to YC | Contact