If "can I be forced to reveal the passcode" is undecided, "can refusing to do so imply guilt" depends on the resolution of the first.
I didn't. I said, in summary, that the first is left open, but that the first necessarily implies the second is not.
If "can I be forced to reveal the passcode" is undecided, "can refusing to do so imply guilt" depends on the resolution of the first.