Congratulations and Yeyasher Kochachem to the co-winners of the Best Answer Contest for the first quarter of 5778!
Here are the original citations, both submitted by mbloch:
b a's answer to Was Psalm 29 derived from Canaanite sources? brings independent research and a clear fact base to disprove the hypothesis of the OP in a convincing way.
Double AA's answer to Sanhedrin/Makkot - One masechta? quotes from a wide gamut of sources (incl. Geniza material!) and reflects significant research work to answer the OP.
The winning entries will split the 300-point bounty prize evenly.
Best answer contest: Second quarter of 5778, covering Tevet through Adar, 5778 (from December 19, 2017 through March 16, 2018), is already underway. If you see a new great answer, please enter it!