behavior note

src/bootstrap.jl

@@ -203,7 +203,11 @@ of coverage intervals.
 
 
 !!! note
-    All coefficients are bootstrapped, including inestimatable ones from the rank deficient case.
+    All coefficients are bootstrapped. In the rank deficient case, the inestimatable coefficients are
+    treated as -0.0 in the simulations underlying the bootstrap, which will generally result
+    in their estimate from the simulated data also being being inestimable and thus set to -0.0.
+    **However this behavior behavior may change in future releases to explicitly drop the
+    extraneous columns before simulation and thus not include their estimates in the bootstrap result.**
 """
 function parametricbootstrap(
     rng::AbstractRNG,