Simplify the following text for a Grade 13 native English-speaking person.
Original: These accusations were rebutted universallyâ '' most prominently by Andrew Tanenbaum himself , who strongly criticised Kenneth Brown and published a long rebuttal on his own personal website .
Simplified: These accusations were refused by almost everyone - in particular by Andrew Tanenbaum , who strongly felt that Kenneth Brown was very wrong and published a long rebuttal on his own personal website .