They can talk about it, but only in third person.
Example:
Sarah: so, what do you think about the pshat I heard tosfos has in tzaras niddah?
Rivkah: well, someone told me they don’t understand how it would change the limud of hukshu kol harayos just because it isn’t “domeh to an achos ishah”.
Sarah: I heard that someone needs to think about it, but I’m sure they’ll get back to me to get back to you.