[lucketone]

If one is unable to feel emotion X, then:

1. One has some ulterior motive for faking it.

2. One’s actions will likely diverge from emotion X. (Eventually)

If everybody believe the same lie, then it could be indistinguishable from the truth. (Until, the nature of the lie/truth become clear)

[johnsmith1840]

Or their ulterior motive is that they don't have one and want to fit in? Meaning they would never diverge?

Didn't realize my point was so philisophical lol

[lucketone]

This is still an ulterior motive (even if benign; we all do it to some extent).

Behavior will diverge eventually.

Because emotions are what drives our decisions.

If you really love tennis, then you spend time and money on tennis. If you just say it to be nice (or to impress somebody), you will not invest into activity that much and will search for opportunity to stop.