Did Justin Use the Nabiym of Yashar'al to Argue Against Yashar'al?

Work: Dialogue with Trypho · 2nd century

What the ancient record says

Yes, a central method. Justin repeatedly quotes the ancestral textual tradition of Yashar'al, Mashah, Dawid, Yashaʿyahu, Yirmiyahu, Zakaryahu, others, and uses them against Trypho and his people.

Ch.29 shows the logic openly: after invoking Dawid, Yashaʿyahu, Zakaryahu, Mashah, he says they are in "your writings, or rather not yours, but ours," and claims his group believes them while Trypho's people read without understanding. Logic: Yashar'al preserved the writings, then Justin reads them through his framework, then claims his group understands them properly, then claims the writings as his group's.

Using another group's writings is not automatically corruption; the stronger move is "not yours, but ours", explicit ownership. Does not prove every quotation matches the earliest recoverable Scroll wording, Justin frequently works through Greek textual forms; presence in Justin ≠ match to earliest Lashon Qanaʿan (Hebrew) witness (requires manuscript comparison).

Matters because later readers inherit Justin's conclusions without realizing the argument was built from the writings of the people he argued against.