Is the Hebrew Letter "Yōd" a Fake Letter?

 A student of ancient languages recently stated that the Hebrew "Yōd" [י] is a "fake letter." 

He learned this in his Christian college. 

This is shocking in light of the fact that the yod is used as a letter in all ancient languages in which it is seen, and it is pronounced.

 

 

The yod is used in the name of the Jewish and Christian God, YHWH, [יחוח]

The Hebrews and Phoenicians used the same letter [Yōd] in the same way, and it is the Yōd that gave rise to the Greek letter Iota [ι]. 

Jesus spoke of the Yōd when he said not one iota [yod, the smallest letter of the alephbet] ... of the Law would pass from the Law until all be fulfilled.

Yodh (also spelled yud, yod, jod, or jodh) is the tenth letter of the Semitic abjads, including Phoenician Yōd Phoenician yodh.svg, Hebrew Yōd י, Aramaic Yodh Yod.svg, Syriac Yōḏ ܝ, Persian Ye ی‎, and Arabic Yāʾ ي.

The Yōd is not a fake letter.