An individual data item may be useful in isolation but not optimal for a particular model-training data mix.

“Yeah, part of like how they wanna produce their model ultimately is experimenting with that data mix, right? Um, certainly there's things that, you know, you might just consider bad, but, um, you might have like an individual unit of data that's actually pretty decent but might not be optimal for the mix that you want when you're training your model.”