If fish weren't so hot, they wouldn't have to swim

From the Muqaddimah

“Students often happen to accept and transmit absurd information that, in turn, is believed on their authority. Al-Mas’udi, for instance, reports such a story about Alexander. Sea monsters prevented Alexander from building Alexandria. He took a wooden container in which a glass box was inserted, and dived in it to the bottom of the sea. There he drew pictures of the devilish monsters he saw. He then had metal effigies of the animals made and set them up opposite the place where building was going on. When the monsters came out and saw the effigies, they fled….
It is a long story made up of nonsensical elements which are absurd for various reasons”

And then he lists the reasons, here are two:

"Djins are not known to have specific forms and effigies. They are able to take various forms."

The next one I explain (it is very long): A man would not be able to dive this way and live because people have to breath cold air…yes COLD air. And in fact he explains that this is the same for fish and this is why when out of the water, without the cooling effect of the water, they die….they cannot breath the warm air outside the water.

All this to say that even when you have a good idea you can really mess it up by explaining how it came about. And even when you are aware of a possible problem you may fall right into it.