But no.As in every census, some people just don't reply and illegal immigrants mostly avoid census-takers.

VOA: standard.2010.02.03

It's illegal, so they can't sign that as a contract, but they they can just agree to do it.

因为是违法的,合同也就无效了,不过他们可以私下达成默契

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So, for example, in around 1900 in America or a little bit earlier, let's say 1880 in America, it really isn't clear that it was illegal to write agreements to say we'll restrict quantities.

比如1900年甚至更早的美国,假如是1880年的美国吧,在当时这种限制产量的合同是否违法,在司法上没有明确的界定

耶鲁公开课 - 博弈论课程节选

In other words, as the judge said, what's always moral isn't necessarily against the law and while I don't think that necessity justifies theft or murder or any illegal act, at some point your degree of necessity does, in fact, exonerate you from any guilt.

换言之，正如法官常说的，情有可原，未必不可法外容情,当然我不认为，一句情有可原,就能为盗窃，谋杀以及其他违法行为正名，但有时，情有可原的程度,确实可能法外容情，赦免你的罪行。

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