Kavka's original version of the puzzle is the following:
An eccentric billionaire places before you a vial of toxin that, if you drink it, will make you painfully ill for a day, but will not threaten your life or have any lasting effects. The billionaire will pay you one million dollars tomorrow morning if, at midnight tonight, you intend to drink the toxin tomorrow afternoon. He emphasizes that you need not drink the toxin to receive the money; in fact, the money will already be in your bank account hours before the time for drinking it arrives, if you succeed. All you have to do is intend at midnight tonight to drink the stuff tomorrow afternoon. You are perfectly free to change your mind after receiving the money and not drink the toxin.
Herein lies the rub: Can you intend to drink the toxin if you know you don't have to?
I want to hear your thoughts about this. I'll post more later on after there's been some discussion. I'm getting this from an article, but I didn't post it all, but I will after I see what you think.
Remember, there's more to this problem than it seems.