"Could you guys explain it to me again? I don't think I've heard those arguments before."

Now, with a Mudcat member, or a GUEST with a handle, it'd be possible to judge whether that's naivety or irony. But no name of any kind means no context.

I'd guess at irony, but maybe that's because I'm from the East side of the Atlantic, where it tends to be assumed that you're ironic in that kind of comment, if you don't explain you mean it. (And even that doesn't guarantee much, because of course the explanation might be ironic as well.)