The tetragrammaton (YHWH) is not found in any extant New Testament manuscript, all of which have the word "Kyrios" ("Lord") or "Theos" ("God") in Old Testament quotes where the Hebrew text has the tetragrammaton. George Howard published in 1977 a thesis that Robert F. Shedinger calls "somewhat speculative", and whose "revolutionary theological ramifications" Howard himself drew out. He proposed that the original texts of the New Testament had "YHWH" (either in Hebrew characters or in a Greek transliteration) in their quotations from the Old Testament, but not elsewhere, and that it was replaced in the copies made during the second century.