Per Bothner wrote:

> An equally plausible explanation is that they were not taught
> (properly) the concepts of references (lvalues)

... which would be perfectly legitimate, because they were being
taught Scheme, not C ...

>						  and the concept of
> pass-by-value.

Given that Scheme is a c-b-v language, it's not clear what else they
would be taught.

'shriram