Every script, post and Help file entry that I have read defines "idle" as no mouse or keyboard activity.
"i.e" means "for example", which a lawyer would say means "includes but is not limited to". Leaving that thought dangling...
This article, "The Definition of Windows Idle," says:
How do you reconcile the two? If we're referring to the same measurement of "idle" it would mean that Task Scheduler's "on idle" will trigger after 600,000 ticks as measured by _Timer_GetIdleTime, correct?