Anchor: As obvious as this insight seems today, though, it wasn't in 1983--Steve Jobs didn't realize it, my computer nerd friends and I didn't realize it and, I suspect, James Surowiecki didn't realize it either.
Entailed: Although this insight is pretty obvious today it was not obvious in 1983 and many people didn't realize it. 
Contradiction: The insight was obvious in 1983 and many different people realized it then. 
Contradiction: A kid is playing with a baseball.
Contradiction: There are animals outdoors.
Contradiction: Construction workers get in trouble for not wearing their hard hats.
Contradiction: A crowd watching people fight