hedge fund benchmarks

so I am wondering if the valid benchmark criteria we learn about in pref Eval is binding to hedge funds. I was doing a pretty old morning test and investability came up, but i don’t notice the chapter talking about non investability making a hedge fund benchmark invalid. i know the Alt chapter has been shrunken in recent years so maybe it was from the older reading. I guess my question is can we use the SAMURAI list from pref eval reading for hedge fund benchmark questions?

samurai is still on the text and all those elements apply to a valid benchmark