And yet it's potentially very easy to prove something is unsafe, or likely to have unforeseen effects. In vitro bioassays, animal testing. Lots of the chemicals

And yet it's potentially very easy to prove something is unsafe, or likely to have unforeseen effects. In vitro bioassays, animal testing. Lots of the chemicals causing problems today could have fairly easily been screened out this way. Just because epistemologically it's impossible to ever know for sure something is safe, that's not a justification for going ahead with almost no testing at all.