ومنها: أن لا يتكرر الأوسط بتمامه
Another defect is the failure to repeat the middle term in its entirety.
In a categorical syllogism, the middle term must connect the two premises. If one premise contains a term as part of a larger construction and the other uses that word with a different logical role, the required link is absent.
Merely seeing a word twice is insufficient. Its full logical unit and scope must remain the same. The following source example uses “hair” to exhibit this failure.