Patur Aval Assur, all I was saying was that it’s not a kasha even if you’ll assume that 1) Chazal were giving instructions for finding the chilazon. 2) ???? ??? only helps you find the murex if you know the chilazon is a snail.
Mendel E. Singer Ph.D. argues that we for no reason should consider a wildly wide definition for Chilazon (even though all other languages using that word use it narrowly). Granted! For argument’s sake: there’s no raya that chilazon means only a snail!
But the point is that if you learnt Gemara you can’t ask a kasha based on a Hanacha. Let alone an unlikely hanacha w/o a shred of a raya!