Anchor: i wonder if we talked before
Entailed: I'm curious about whether we've spoken before.
Contradiction: I don't want to know if we've talked before.
Contradiction: There is no difference.
Contradiction: The athlete navigated the kayak carefully.
Contradiction: A man is standing at the bar talking to a woman.
Contradiction: I will have to go and look that up because I haven't heard of that before.