Learning is the process of failing repeatedly in the pursuit of achieving something until you finally succeed.<p>That sounds fine as a definition, but that doesn't imply learning can't be fun. The "proof" provided seems to rely on "like" being binary, it falls down because you may like succeeding so much that it outweighs the dislike of failure, or you may like failing that little bit less each time. Having learnt quite a few skills so far I can honestly say learning, even as defined above, is fun.