Official Rules Update and FAQ (Draft versions 1.01 - June 21)

[Tom H.]

More and more, it does appear that the intent is that being disabled by terrain does make a unit vulnerable to a 'D' combat result. (I checked the Ogre Miniature rules for comparison, and while not unambiguous, it seems to align more.)

Originally Posted by GranitePenguin

It's not ambiguous; a "D" is a "D", regardless of where it comes from. The game does not make a distinction between disabled by an attack vs disabled by terrain; the resulting disable is identical.

To me, there is a condition named "disabled." I regard a 'D' specifically as a combat result code that may generate a disable.

There is at least a distinction in the type of disable for purposes of recovery from the condition.