You are so sure of yourself, but you’re actually incorrect.

I try to correct you politely, so that the next time you talk about this, you’ll be properly-informed.

You reassert yourself again, this time with an I’m-older-than-you-and-therefore-I’m-correct attitude or a similar illogical attitude, which aggravates me because I tried to be polite in correcting you and you dismissed it arrogantly; you’re not open to accepting the fact that it’s even marginally possible that you’re wrong.

This is worse than just having been wrong to begin with.

I’m not going to argue with you because I can see that it’s not only pointless, but also deleterious to our moods; we’re both just getting frustrated.

Everyone around believes you.

Misinformation is transferred.

You don’t believe it, but it’s your fault. Ignorance lives because of you.