I think others are stupid. Oh noes, I guess I'm the stupid one then.
Jokes apart, there's a consistent pattern in how I judge intellect. The people who I consider smart get logic. Some of them do it intuitively; Some of them are familiar with formal theory. The most common logical error made by those I consider stupid is a non-sequitur [1] Ex: "He doesn't use vim. He must be stupid". The biggest mistake you can make is judge people by knowledge, rather than intelligence. Ex: "A is really good at programming. He's definitely more intelligent than B who's a singer"
Jokes apart, there's a consistent pattern in how I judge intellect. The people who I consider smart get logic. Some of them do it intuitively; Some of them are familiar with formal theory. The most common logical error made by those I consider stupid is a non-sequitur [1] Ex: "He doesn't use vim. He must be stupid". The biggest mistake you can make is judge people by knowledge, rather than intelligence. Ex: "A is really good at programming. He's definitely more intelligent than B who's a singer"
[1] http://en.wikipedia.org/wiki/Non_sequitur_%28logic%29