Are you both talking about the alphabet found in Egypt by Dr Darnell from Yale?
And which is the oldest writing system? They say that it's the Sumerian cuneiform in the Tigris and Euphrates Valley (present Iraq). It was pictographic until 1400BC.
But there are also some pottery fragments found in Pakistan (Harappa) dated back 5000 years that might refute that theory.
I doubt Egypt carries the oldest treasures of human intelligence. Pakistan, India and China regions were always focused on the development of man's soul and knowledge rather than conquering and expanding the political borders therefore we should look for answers there.