Re: isolation, not just during paging

I don't know that HTTP itself provides much in the way of guarantees here; 
and the answer might vary based on things you left unspecified like cache 
controls (if the GETter doesn't demand a fresh copy, a cache could return 
data that from the outside we'd call stale).

PATCH requires that intermediate results *of the patch request* are not 
observable, I was reading 5789 today.
I re-skimmed 7231 and did a few searches on likely keywords (incl Must 
Not) w/o finding anything clearly addressing your question.

Best Regards, John

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