Of course not.

I remember a joke regarding unfair bets :D

A Finn and a Swede went to a western movie. In a scene where the hero tries to sneak on an indian, the Swede says to the Finn "I bet you 50€ that the indian will win". The Finn agreed. It turns out the hero successfully sneaks upon the indian and knocks him unconscious.

After the movie, the Swede gives the Finn 50€ as agreed on. The Finn feels a bit ashamed and tells the Swede "I can't take this, I kind of cheated because I have seen the movie before."
"So have I, but I did really believe the indian would have learned from the last time!" replied the Swede.