oh what a kettle of worms here... Now the mind must consider "repetitive speech under pressure and in formal situations" in contrast and comparison to "limited

oh what a kettle of worms here... Now the mind must consider "repetitive speech under pressure and in formal situations" in contrast and comparison to "limited mechanical ability to produce grammatic sequences of well-known words" .. where is the boundary there? I am a fan of this paper, warts and all ! (and the paper summary paragraph contained some atrocious grammar btw)