Redundancy is often times a feature. Certainly in natural language as it allows for seemless error correction if there is some word you didn't hear or some letter you can't see. Or in computer communications too, like with CRC or similar codes (mentioned in the article).

I find that a certain level of redundant language in a sentence or paragraph can allow me to sink different hooks for a reader and thus reduce the likelihood of having to repeat myself.

The hook-euphemism is similar in nature but different in application to Feynman's self-labelled "chaotic" approach to teaching

Ask an avionics suite.