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More drama in the Fat Joe civil case ... his accuser's attorney, Tyrone Blackburn , is getting called out for blaming a legal mistake on artificial intelligence software.

Here's the deal ... Fat Joe's attorneys filed legal docs claiming Tyrone cited cases that didn't exist in his opening brief, and then Tyrone blamed the mistakes on a LexisNexis AI feature. Instagram / @tyrone_blackburn

Well, seems Tyrone's excuse made its way back to LexisNexis, and now the company is speaking out and pushing back against Tyrone.

In new legal docs, obtained by TMZ, Fat Joe's legal team submits a letter from the head of legal for LexisNexis ... and the LexisNexis lawyer says Tyrone was not an authorized user or subscriber to their AI products, despite what Tyrone himself claime

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