"Dave" wrote in message
m...
my implication was that if you're flying "hard IFR", you're in IMC on
an IFR flight plan, and would thus be subject to 91.21.

91.21 applies to all flight. If you think that WxWorx with a laptop is not
legal for "hard IFR" (which most of us call "hard IMC") based on 91.21, then
you think it is not legal under any circumstances. Do you really think
that?

Pete