I noticed that quote as well. Odd thing to call RnRS Scheme loosely specified. The RnRS spec is extremely well-written - and it even includes a semantics. Now

I noticed that quote as well. Odd thing to call RnRS Scheme loosely specified. The RnRS spec is extremely well-written - and it even includes a semantics. Now "Scheme" used to mean "a Scheme like language" is of course loosely specified - but that's another story.