If you try to add more than one answer, you'll get:
You have already answered this question. You can not answer twice, but you can edit your existing answer
We're using ponder for juxtaposing different solutions, and one person might have more than one solution to a question.
This is feature would change Ponder from being a Q&A app like Quora / Stack Exchange into being just a discussion forum. I think this limitation is important. The expectation then is to provide the best answer, or list multiple in your original answer if it's important to give options.