I have a string feeling that only one solipsist need have a navel, but I'm not sure I can make a good case at the moment.

How many solipsists does it take to change a lightbulb? (I don't know the answer, I'm just curious.)

If a human being falls down in the forest and there isn't a tree there to hear it, how does he (the hb) justify his/her belief that s/he's in a forest?

Is there no end to this inanity?

Steve
PS Yes: it stops here.