That was just an example of what would occur in this system if oil flow was blocked.In post #57 you said:
"If you have bypass/regulator around the pump you DO NOT have an effective positive displacement OIL FLOW. So if oil was not flowing you would have static head of say 60-70 PSI and the volume of oil would flow around the pump."
That is a confusing way to describe a PD oil pump IMO - you say "so if oil was not flowing". Even if the pump is in pressure relief there is still oil flowing - plenty of oil as shown in the graph in post #64. Oil is never not flowing. You make it sound like all flow stops. Your statements however in post #72 makes more sense.
Oftentimes to understand a system you have to look at the limits;
as here, unimpeded flow then fully impeded flow to predict what happens when approaching functional limits.
As we do in the calculus of differential equations
The keyword in my statement was "IF". I agree I could have explained it better for the Layperson.
I must be more attentive to my audience.