A question about Conditionality

As is known to many of us, "A is sufficient for B" is considered conditionality and thus can be diagramed as A-->B. My confusion lies in the negation of the sentence "A is not sufficient for B". What is the correct formulaic diagram? Obviously I am not leaning toward A -->B; According to Logic Reasoning Bible, to negate conditionality is to negate its necessary condition, so if  "A is not sufficient for B" is the negation of the conditionality, which seemingly makes sense to me, is the diagram of "A is not sufficient for B" A-->B  ? I am a bit at a loss, could any one help me out?

I do appreciate it.

A--/→B

Thank you Seagrass for your prompt reply. I am still in confusion, however. How about "B is not necessary for A"? Is A-->B  correct? Why not A--\-->B?

"A is not sufficient for B". A对B来说是不充分的. 也就是说, A, 有可能推出B; 也可能不推出B. 因为你不知道sufficient for B的其他条件是否已满足.

说白了, A is not sufficient for B. 基本上是废话一句. 在这个句子中, A和B的逻辑关系是非常弱的.

举个例子, 有个人说, Money is sufficient for good life. 这时候, 钱=>好生活.

但如果有人说, Money is not sufficient for good life. 这个时候, 你有钱, 你可能有好生活, 也可能没有. 因为你不知道满足"好生活"的真正充分条件达到了没有.