| New methods in glottochronology provide logical and empirical proof that the second assumption is true. |
| He added that their argument assumed a constant rate of language change, the very point they know is wrong in glottochronology. |
| The basic fallacy of glottochronology lies in the fact that it a priori assumes that all languages change at the same rate all the time. |
| These are not generally accepted by historical linguists, who long ago developed but largely rejected a dating method known as glottochronology. |
| Because of these and other problems, many linguists have given up on glottochronology, showing more interest in an ingenious dating method known as linguistic paleontology. |
| Unfortunately, the last published glottochronology for all the Caddoan languages dates to the 1960s, before the technique was refined. |
