It's not worth the time. They were called out for being unkind. Instead of responding appropriately, they imagined the other person to be unskilled in reasoning to justify their unkindness. They were then called out for this desperate evasion. Again, instead of responding appropriately, now the...
Your argument seems to be:
1) Such a rule would be written on the cards.
2) It's not.
3) Therefore, it's not a rule.
You originally answer with 1). They explain that they're new and thus didn't know 1). But for some reason, you then proceed to criticize them (calling their question "really...