What was ironic about the fact that it was the Navajo language that the code was based on? A) There were many Japanese code breakers that spoke the Navajo language B) Native American people faced prison time for speaking their own language rather than
The number of years, N(r), since two independently evolving languages split off from a common ancestral language is approximated by N(r)= -5000 1n r, where r is the proportion of the words from the ancestral language that is common to both languages now.
