In the High Middle Ages, Latin, though no one's native tongue, was the language of international scholarly communication in Europe. Petrus Alfonsi, a native Hebrew and Arabic speaker. was unquestionably the author of four twelfth-century scientific works. Some scholars also attribute to Aifonsi two later scientific texts, because of their similarity in content and doctrine to the earlier works. However, the Latin in the first four works is impeccable while that in the later texts is not furry competent. Therefore, these two could not have been composed by Alfonsi.
Which of the following, 4 true, most seriously weakens the argument above?
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