Short handed poker, Ed Miller, Bunching Effect, The Price is Right

[$ock]

Fascinating puzzle. U gain information + equity by not opening door B.

Reminds of the kind of situation in NLHE where u have a medium/high pocket pair and there are 2 all-ins in front of u. U don't like your chances, until someone/something comes along and tells u they're both holding AK. Now u gladly decide to call.