Most of your examples are social membership tests. You have to publicly say "XYZ" to join the club, where "XYZ" doesn't necessarily mean anything, but joining the club does. Like saying Abracadabra to open a door.

(Spoiler alert don't read till the 26th)

Do you believe in Santa? I believe in Santa. Oh how nice you also believe in Santa. Aren't we all happy members of our club? It would be so antisocial for someone to say Santa doesn't exist, because then how would we tell who is in our club? This is the best club ever. Santa? Who's that? We just talk about him to pledge allegiance to each other, we don't actually care about fat dudes in red suits.