Reply To: Techeiles 🔵❎🐌☑️🐟

“Because if the gemara says you need a chemical test pashtus that means it was a different color or it means all the tanaim and amaroim were color blind.”

Maybe I’m misunderstanding you but logically (and logic seems to be very sparse in the CR) the neccessity of a chemical test would mean that they were the same color. If they were different colors then you wouldn’t need a test – you could just look what color it is. Now it happens to be that the test that the murex trunculus passed is the same test that plant indigo passed and it seems to be agreed upon that plant indigo is kala ilan. So clearly the test is being done wrong.