It's difficult because the sensory feedback corrupts the signal. The example he uses is when using a radio.
Transcript:
" The trouble is these signals are not the beautiful signals you want them to be. So one thing that makes controlling movement difficult is, for example, sensory feedback is extremely noisy. Now by noise, I do not mean sound. We use it in the engineering and neuroscience sense meaning a random noise corrupting a signal. So the old days before digital radio when you were tuning in your radio and you heard "crrcckkk" on the station you wanted to hear, that was the noise. But more generally, this noise is something that corrupts the signal. "
The definition of "tone" in literature is the way the author expresses his attitude through his writing. The tone can change very quickly or may remain the same throughout the story. Tone is expressed by your use of syntax, your point of view, your diction, and the level of formality in your writing.
The purpose of the piece is to persuade the person.
EDIT: For other people who need the correct answer.
It creates an image in the readers mind early on, establishes the tone/mood of the poem, and hooks the reader with vivid language
Answer: "the golden touch" has gone from being a negative symbol of greed to being a positive symbol of monetary success.
Explanation: