And crucially, voidable only at the option of the person who lacked capacity.

关键在于，只有缺乏行为能方才有权选择否销合同。

Voidable so they can get out of it.

销，因此他们以解合同。

And the key takeaway, the headline rule, is that contracts entered into by these folks are typically voidable.

关键要点，即核心规则：这些人所订立合同通常销。

A contract is voidable if a party lacked the mental ability to understand the nature and consequences of the transaction.

如果方缺乏理解交易性质和后果精神能，合同被销。

If the mistake goes to the essence of the agreement and has a material effect, the contract may be voidable.

如果错误涉及协议核心内容并产生实质性影响，合同能销。