why the Medu-Netchher- Hieroglyphics have never been deciphered

I am no student of ancient writings or symbols of Egypt.

Walter Williams makes the above claim and gives the following as his reasons

  • in order for the Medu-Netcher or hieroglyphs to have been deciphered, one would have had to ask the ancient Egyptians who drew the symbols what he/she meant for them to be
  • no one can put a phonetic alphabetical value to symbols
  • you cannot apply a language or languages to symbols that one does not know the meaning of
  • it is impossible to reduce the 400 or more symbols of the hieroglyphs to 26 letters of the alphabetical system

HE argues further that pioneers in Egyptology (sic) as Barthelemy, Count Silvestre de Sacy and Champillion arbitrarily assigned letters to symbols and these were then accepted by Western academia.

Quoting Carol Andrews writing for the British Museum on the Rosetta Stone who wrote

it is not possible, strictly speaking, to compile an alphabet of hieroglyphic signs. For practical purposes, however, certain unilateral hieroglyphics have been selected to form a kind of alphabet which is universally used for the organization of dictionaries, word lists, index and for general reference purposes,

he makes the point that one can not use the Rosetta Stone to decipher the Ancient Egyptian hieroglyphs.

Historians and linguists, what say you?