This program does a good job of guessing what object you are thinking of, even when it disagrees with some of your answers. It asked 16 questions before it correctly asked if I was thinking of a cloud. I said a cloud was "mineral," it said "other." I also said a cloud weighed more than a duck, it said no. When I played again with "shadow" the computer and I disagreed on a bunch of things, which is probably why it gave up:
You were thinking of a shadow.
Can liquids pass through it? you said Yes, I say Doubtful
Are there many different sorts of it? you said No, I say Yes
Do you know any songs about it? you said No, I say Yes
Can it fit in an envelope? you said Yes, I say No
Would you be lost without it? you said No, I say Yes
Is it useful? you said Probably, I say No
Can you touch it? you said Yes, I say No
Can you walk on it? you said Yes, I say Doubtful
Is it flexible? you said No, I say Probably
