I think people who are patient and interact with children with respect and empathy is a giveaway.

    • Maybe my definition of “decent human being” is too strict, but it’s way too rare for me to assume it.
      I assume that someone I don’t know is alright, but they have to do some kind act or show good behavior at their expense without expecting to be rewarded for me to understand that they really are a good person and aren’t just good to others when it’s easy and beneficial for them.