The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

...which is required for COGNITIVE
reasoning, including scientific inquiry...
The Big Bang Theory Season 4, Episode 3

The engineers call it
a COGNITIVE plateau.
Westworld Season 2, Episode 4

I started doing some reading
on COGNITIVE vitality,
The Big Bang Theory Season 10, Episode 22

You need your sleep for your COGNITIVE
processing to perform at optimum levels.
The Big Bang Theory Season 2, Episode 6

Impaired COGNITIVE function.
The Big Bang Theory Season 3, Episode 14