Counter-Intuitive Science

Not sure if it is counter-intuitive per se, but Archimedes' Screw: I don't why, but it sets off a false-positive on my bullshit meter.
It all 'seems wrong'.Edited by Panda, : typo

On a similar vein: the phases of the moon not being caused by the Earth.

Your intuition/common sense tells you that you do not exist?

...but you are too much of a tosser to clarify what you meant.
*nods*

Thank you for providing the eloquence I am currently lacking.

We should burn the cannonball as a witch!!My physics teacher filled a large tray with mercury and floated various chunks of metal in it.
Even in front of your own eyes it still looks 'all wrong'.

Weight is not affected by velocity.
You can't increase your weight by moving quickly (unless you approach the speed of light maybe?).Edited by Panda, : added question mark

If you let your imagination 'run riot', there seems to be too many possibilities.The sliding doors were on a tube train?
The sliding doors were opened by a security guard inside?
The sliding doors were locked because they led to a shop which closed after the previous people entered?
The sliding doors were on a lift?etc...

'Logic problems' often rely on incorrect interpretation of words for them to work.
e.g. "What walks on 4 legs, then 2 then 3?" is intentionally misleading as '3 legs' includes a walking stick.I was thinking that the use of the word 'weight' was the 'trick'.
Obviously, in reality, pressure mats are triggered by any type of downward force (including weight and momentum).

You distinctly said the sensors detected your weight too.

The Monty Hall Problem seems to cause people a lot of grief.

quote:

---

Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?

---

Luckily, when I first heard of it, it was from a very clever friend who successfully explained it to me in 30 seconds. I did once see a forum thread that dragged on for over a year with people constantly arguing back and forth about what the correct answer was.

In the thread (mentioned previously) they went to far more effort than that (after trying your explanation and getting nowhere).They posted code (in various languages) so that people could see the actual results.
They had graphs and Venn diagrams and...well, everything you could think of and more.
But it is so counter-intuitive that some people never understand.It is annoying that I can't find that thread again.
It was epic and epic fail simultaneously.Edited by Panda, : No reason given.

Succinctly put? Maybe.
Simply put? Not so much. My favourite comment is:
If you switch, you halve your chance of winning a goat! *sadface*Edited by Panda, : No reason given.

The answer is here: Message 69.

I am not sure I agree with this (I've not given it too much thought), but I think I have accidentally swamped Dr. A's thread with messages about Monty Hall.If it's ok with you, I'd rather leave this as an unfinished discussion than continue to usurp this interesting thread.