... the cause of the incorrect translation. Before the account of the program itself we give a short sketch of the considerations which led to the program, to- gether with a statement of the reasons ... discover some sort of trans- formational rules connecting them, in terms of which a computer program might be written. The transforma- tion rules might be derived from a comparison of the two languages ... are always changing. For this reason, we feel that any computer program which deserves the name of a language trans- lation program has to be a program which is capable of expansion, in a regular...