What is the basic human impulse that makes someone write “d” instead of “the”?
It cannot be brevity, economy, lack of english sensibilities (if you know enough to write “d”, you can write “the” as well) or a regard for people (a much higher effort deciphering the code).
I hypothesize that that instinct,of constantly shortening words as an automatic impulse comes from a ‘need to be cool’,in ways and places that the person knows they are not (a self judgement, so to say). It is a holding back of whatever one is saying, of a fear of being judged for what you are putting out.
It’s a similar explanation to what psychologists consider the basic underlying emotion behind slurring. One slurs over words that one is not comfortable with.