I thought this was totally sorted by Bob Bundy. Maybe he wasnt clear enough so Ill have a go for him.
Lets call the test availability period, TAP, measured in days.
The professor has declared: Statement = but you won't know in advance which
So on Sunday evening,
As we reach the evening of each day without a test, TAP reduces by 1 and if we count back one day TAP increases by 1.
Deduction one: So by Thursday eveningand so the student deduces that the statement implies the test cannot take place on Friday, so
So far, so good. But then the students logic goes wrong. The students logic, not the professors. Which is at it should be; he is the professor after all. :)
On Wednesday evening. But the student thinks because of deduction one and counting back one day. And hence the test cannot take place on Wednesday, making
But you cannot use deduction one on Wednesday evening , because deduction one requires that it is Thursday evening and it isnt. You cannot use logic like this.
In post 56 Bob set up a parallel situation involving his next post. In post 65 he made this post. No one successfully predicted when he would post, but the post occurred. He clearly wasnt lying!
He also said he was giving up on the thread thereafter. Thats why he has asked me to remind everyone about what he said; so he can maintain the position that he was not lying.
I am, of course, happy to assist him.
You seem to be missing something.
In post 57 bob said he would post during the week but you wouldn't know when.
In post 66 he posted. It was a Tuesday. Nobody predicted that.
He also said "So, I'll have one last go and then I'm giving up on this thread."
So he is clearly not going to come back to this thread again.