I agree, and I don't mean to imply that the very first mention of "I want to quit" is the right time to quit. But, as a parent, it isn't difficult to have a sen

I agree, and I don't mean to imply that the very first mention of "I want to quit" is the right time to quit. But, as a parent, it isn't difficult to have a sense of where they fall on that spectrum. And yeah, you won't be 100% right, but such is life.