I leaned it well enough to be pocketing balls with it & to find out when it would not do so without an outside subjective interpretation & input.
From that point on it was in doubt & Stan's You Tube perception videos confirmed that doubt.
From that point on I realized that it was not as it was affirmed to be & not something that I was nor am interested for my game.
That said...
If anyone wants to or is considering buying & trying CTE they should do as they wish but should know that the assertion that it is a totally objective 'system' has not been proven nor unproven.