Please tell me:
* What story or universe are these characters from? (e.g., a book, a video game, a movie)
* What are the strengths and weaknesses of each character? (e.g., Praiseworthy is fast but weak, Mountain Ox is strong but slow)
* What evidence is there in the story that Praiseworthy believes he can win? (e.g., has he won against other strong opponents before? does he have a special ability that could help him?)
Once you give me this information, I can help you understand why Praiseworthy might believe he can defeat Mountain Ox!