Anchor: so they'll actually fit in the canoe and then you go for days at a time
Entailed: they do fit in the canoe, you can row for many days at a time
Contradiction: they don't fit in the canoe at all, and you can only go for one day
Contradiction: two people dressed as Superman and Batman
Contradiction: Tuppence's doubtfulness was obvious.
Contradiction: The website www.ushga.org/links.htm has no spelling error
Contradiction: A woman is at a restaurant.