大全258-E选项是部分否定吗?

258.  During her lecture the speaker used map to clarify directional terms, for not everyone in attendance was knowledgeable that winds are designated by the direction from which they come.

(A) or not everyone in attendance was knowledgeable

(B) for everyone in attendance did not know

(C) with everyone in attendance not knowing

(D) with everyone attending not knowledgeable（E）

(E) for not everyone attending knew

答案是E.

但我想确认一下E是部分否定吗?