Like baptism, for example?
You can't know how you're example is true!
For example, it's very interesting to read all the books of the British assyriologist Theophilus Pinches, especially this two ones :
1) The Old Testament in the Light of the Historical Records and Legends of Assyria and Babylonia
2) The Religion Of Babylonia And Assyria
and the transcript of a conference he gave : Assyro - Babylonians and Hebrews - Likenesses and contrasts
With these books, you understand very well, than almost all about the hebrew religion, came from the babylonians... like Abrahm came from Ur...
And then, ironically, all about christianity, and about JW doctrins, have, in fact, pagan origins !