"3) In hindsight, it's easy to say what's, for instance, the shortest way out of a labyrinth. But one needs to go many false routes to find out. Are these usele

"3) In hindsight, it's easy to say what's, for instance, the shortest way out of a labyrinth. But one needs to go many false routes to find out. Are these useless, ..." I think the problem of philosophy has not been following some false routes. That is necessary and good as you point out. The problem has been that a lot of talent has been wasted going around in loops.