what was that? is that all there is? who is this? this is it.

Replying to RedKev, who said...

The science of eating as a messenger should be another course you could offer. PNR is a vague concept that can be difficult to understand kind of like depth of field. Food types and location make all the difference and have vastly differing PNR values. Thanks for putting a name to something I had to deal with all the time. What do you call the churning in your stomach when you hear the chirp or ring of your phone when you're still in limbo, after the money has changed hands, but before you get a crack at the food?

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