why func() is too favourite to MS Linq devs.

Question

why Linq developers has used func<> in places where Predicate was suffice.

for example the where extension method actually takes a func with bool as output

means it takes func<Tsource,bool> but they have given it a name of predicate.

   when they could directly take predicate like they have used in Find extension method , why not in where method?

Find (Predicate<T> match);