Sixty-Sixth Journal Entry

[puzzledprof]

I suppose I'm overdue for a puzzle, aren't I? I thought I'd try something different this time. Instead of giving the same puzzle to everyone, you can ask me for whatever kind of puzzle you'd like. I've found that my number puzzles don't go over very well, so a choice would be best, wouldn't it?

Comments

[hullonurse]

I wouldn't mind a puzzle, I suppose. What kind do you prefer?

[puzzledprof]

All sorts, of course. I suppose I prefer logic puzzles these days, but it changes from time to time.

[hullonurse]

Well, then, I would quite like to hear one.

[puzzledprof]

Three friends are arguing about how many white fish are in a group of yellow fish.

The first says, "There are at least four white fish."
The second says, "No, there are less than four white fish."
The third says, "There is at least one white fish."

If only one of them is correct, which one is it, and how many white fish are there?