It's the word "proving that you need to focus on in that quote. I think the author meant that the in vitro testing is not always as accurate as the in vivo testing. You can reach a higher level of certainty by testing with critters than you can in a test tube. And frankly, not every type of ingredient or body part can be emulated in vitro with equal accuracy. So you have to strike a balance in your decision.
It'd be great to have high certainty and no animal involvement, but those two things don't typically go hand-in-hand.
The discussion is interesting, but I haven't changed my stance that it's a matter of balance. And that animals don't always win. People first.
This said, I don't think mascara was mentioned in the US Bill of Rights, and don't wear it myself - so when it comes to cosmetics I say "just dump 'em all" - but I'm pretty sure a lot of CONSUMERS would disagree.
It'd be great to have high certainty and no animal involvement, but those two things don't typically go hand-in-hand.
The discussion is interesting, but I haven't changed my stance that it's a matter of balance. And that animals don't always win. People first.
This said, I don't think mascara was mentioned in the US Bill of Rights, and don't wear it myself - so when it comes to cosmetics I say "just dump 'em all" - but I'm pretty sure a lot of CONSUMERS would disagree.