Is That a Causal Inference?

There's two kinds of assumptions that you can actually check with data, and there's ones that you just can't, right? Yes. Likeo, so that might be an assumption of exchangeability, or whatever, whatever you migt want to call it. Ye. Another one thats common is like, and this is where i get all alike, oh, we should be doing survival analysis,. But what's thi, what do they call ta denominator? Like, the time that that was available? I don't know. Oh, yer ot ye, it's not the same thei was at thi time on, i cammember, what that's called,