[racket] A primitive more fundamental than a continuation?

Matthias wrote:

>> The documentation (See Guide s10.3) says "A continuation is a value
>> that encapsulates a piece of an expression context"
>
> Someone should submit a doc bug report to the Guile people. The
> 'expression' should be replaced (or supplemented) with 'evaluation'.

Not "Guile", "Guide". This is in the Racket Guide, first sentence of 
10.3 (Continuations). The same phrase ("expression context") appears in 
the Racket Reference, 1.1.1 (Evaluation Model / Sub-expression 
Evaluation and Continuations). "Evaluation context" definitely resonates 
more with those who understand the formal semantics, but I am not sure 
it makes much difference to someone trying to learn from the more 
informal Guide, which is vague about the evaluation model. --PR