wiki says that Rashba limited study of philosophy and science up to 30 y.o
Horowitz master thesis at YU refers to Minhat Kenaot, p 27-28, 32-37
Some of the argument is about inability of Aristotle to explain magnets and kameot (amulets), thus undermining philosophers claim to ultimate truth v. tradition.
It seems that Rashba mostly does not like speculative philosophy while being in favor of what is empirically true – medicine, astronomy, and kameas that were deemed experimentally useful (possibly via placebo effect?)