Comment by abustamam

In some cases (like this), 99.99% isn't enough. 100% is mandatory.

I moved into my house a few months ago and while I was exercising my foot discovered a nail that I guess was left by the previous homeowner/tenant/builder. Fortunately it was just a scratch, but it could have easily turned into a trip to the ER.

With a baby learning to walk and crawl, the tolerance for cleaning up nails on the floor is absolutely 100% (or 0% nail) so I scoured the entire house carpet with a strong magnet to ensure there no other surprises. I did this several times just to make sure

This was a few months ago and yet I still tend to have anxiety when walking on the carpet now.