What does it mean when seed sinks to bottom of cup of water right away

The seed is bad or good should I leave it in water less time than the normal float for 24 hours then let sit for a few hours , then put into moist napkin and Ziploc bag in a dark box for 24 hours or until I see tap root

Im sure the seed is fine, just proceed as normal.

Thank you very much , anyone with any knowledge of why most float and some sink please let me know, I’m curious