Er...I disagree.
Taking a look at dictionary.com here is the definition of a "robot"
ro·bot /ˈroʊbət, -bɒt/ Pronunciation Key - Show Spelled Pronunciation[roh-buht, -bot] Pronunciation Key - Show IPA Pronunciation
–noun
1. a machine that resembles a human and does mechanical, routine tasks on command.
2. a person who acts and responds in a mechanical, routine manner, usually subject to another's will; automaton.
3. any machine or mechanical device that operates automatically with humanlike skill.
–adjective
4. operating automatically: a robot train operating between airline terminals.
[Origin: < Czech, coined by Karel Čapek in the play R.U.R. (1920) from the base robot-, as in robota compulsory labor, robotník peasant owing such labor]
There is a distinct difference in what robot means and what bionic means. Having man-made parts in one's body is having bionic parts and makes one bionic. See below for that definition...
From Merriam-Webster's Medical Dictionary
Main Entry: bi·on·ic
Pronunciation: bI-'än-ik
Function: adjective
1 : of or relating to bionics
2 a : having natural biological capability or performance enhanced by or as if by electronic or electromechanical devices <our future may lie not with the bionic man but with natural man —Susan Schiefelbein> b : comprising or made up of artificial body parts that enhance or substitute for a natural biological capability <a bionic heart>
Nobody with a CI, artificial knee, or any other man-made part in their body can be called a robot by definition. They have bionic parts that mimic the natural body parts. If anything, they can only be called a bionic person or better a cyborg. That doesn't make them any less human. The body is just one component to what makes up a human being.
There have been fascinating discussions elsewhere about the nature of being human as pertains to bionic parts. In particular, what percentage of bionic parts in a person makes him no longer human. Micheal Chorost brings this up in his book "Rebuilt".
I take the tack as long as the personality, will, and soul of a person is not altered by these parts, the person is human.