Re: What about a dealer just looking at mucked cards?
 

There is no show one, show both rule where I work (that is an idiotic rule suitable for harrahs but not based on any sound reasoning). However, I set every flashed hand either aside or specifically as the bottom two cards of the muck (with non flashed cards I of course muck them properly so they are 100% unidentifyable). This way if asked, I can show one, show all.