Mark
CreativeMountainGames.com
Rule Zero was often cited in previous editions of D&D as a way for DMs to disallow circumstances or actions that the rest of the rules might support but which the DM felt was untenable. The new edition has a so-called Rule "Yes" default that suggests the DM should allow most things in an effort to promote fun, sometimes at the expense of realism or other concerns. How often has Rule "Yes" come to the fore in your 4E games? (and explain, please.)