The reason you can’t use it, is because you don’t actually know it, you only know parts of it (you only understand parts of it), you have to understand it fully in order to use it.
Inert knowledge is information that a person knows but doesn’t fully understand, which means that they can only recognize, express, or use it in very limited ways. https://effectiviology.com/inert-knowledge/
If you fully understood it, it wouldn’t be inert, it would just be knowledge.
Understanding is required for knowledge.
Well, no, you can’t compare ‘anything’ with ‘everything’. You clearly don’t understand set theory.
‘Any thing’ is contained in the set of all things, the ‘every thing’ set.
You can understand any thing, even if you don’t understand every thing.
Inert knowledge is information that can be expressed but not used to solve problems in real-world situations. It’s also known as “dead knowledge”.
Correct, yet that’s what you are doing.
You can know something without understanding it. Just like lots of your favorite phrases and words, you know them, but you don’t understand them.