«ما أنا قلت هذا ولا غيري»
Neither I nor anyone else said this.
The source examines a restrictive reading under which the first expression might be interpreted as shifting the act of saying to someone other than the speaker. Under that strengthened reading, adding “nor anyone else” creates a conflict.
But the conflict is not unconditional: “ما أنا قلت هذا” can simply deny attribution to the speaker. The examples therefore require a distinction among restriction, strengthening a judgment, and contextually appropriate word order.
Do not impose a stronger exclusive reading when the linguistic and contextual evidence does not support it.