I use a simple mnemonic to help me remember the key attributes of each of the three. It takes the first letter of each word (AIMLDL) to begin a sentence and has a very basic rhyming structure to aid in memory retention.

An *

Intelligent machine does not yet exist and may never.

Machines that learn are a

Logically impossible logical contradiction now and forever.

Deep is a pseudo modifier term with no fixed meaning in

Language and can mean whatever whenever to whoever