Right but even with some negative lash and valve not closed tight tight a rookie will not know except when looking at ET slip based on my personal observations in that one case
Theory and answers it takes to get an 'A" on the test are not always dead on except on paper
For sure it is awful to run like that and has all kinds of consequences but ......
That tale was to aid in enlightenment and flesh out my entire argument

I greatly respect your knowledge--- I try and help where I can adding in real world experiences--reading a book about how to swim is a good start but you can't read that book and jump off a pier or you will go to the bottom--