macros expanding into definitions

["Guillermo J. Rozas" <gjr@martigny.ai.mit.edu>]

   Date: Tue, 1 Dec 92 16:32:44 -0800
   From: William Clinger <will@skinner.cs.uoregon.edu>

   I prefer not to say that a variable bound by lambda or let etc is
   assigned, absent a use of set!.  If variables bound by lambda or
   let were said to be not unassigned, it would be reasonable to
   infer that they have been assigned.  Then students would be even
   more likely to become confused about binding versus assignment
   than they already are.

What about "uninitialized"?