Not done the careful way that science is supposed to be done.

Not done不是用 the careful way that science is supposed to be done科學該有的那種嚴謹方式做的。

The commonest use is about method: too few examples, no control, no measurement, results chosen to fit what you already believed. "I asked five friends" is an unscientific survey — not a lie, just too small and too casual to prove anything. Writers use it a lot about polls, tests and studies.

The commonest use最常見的用法 is about method是關於方法: too few examples例子太少, no control沒有對照組, no measurement沒有測量, results chosen to fit what you already believed結果被挑選成符合你原本就相信的想法。"I asked five friends"「I asked five friends」（我問了五個朋友） is是 an unscientific survey不科學的調查——not a lie不是說謊, just只是 too small and too casual太小太隨便 to prove anything沒辦法證明什麼。Writers use it a lot作家很常用這個字 about polls, tests and studies來講民調、測驗和研究。

A second, sharper use is about claims: an unscientific theory is one with no evidence behind it, or one built so that no test could ever prove it wrong. Here the word becomes an insult, and it is a strong one in an argument about medicine or climate.

A second, sharper use第二種、更尖銳的用法 is about claims是關於主張: an unscientific theory不科學的理論 is one with no evidence behind it背後沒有證據支持, or或是 one built so that no test could ever prove it wrong設計成永遠無法被測試推翻的理論。Here the word becomes an insult這時候這個字就變成一種侮辱, and而且 it is a strong one在講醫學或氣候的爭論裡 in an argument about medicine or climate是很重的一句話。

Watch out for one very common softening move: people say "this is completely unscientific, but…" before offering a hunch. That is a polite way of admitting in advance that they cannot back it up. Doing so makes the remark harmless.

Watch out for one very common softening move要小心一個很常見的緩和手法: people say有人會說 "this is completely unscientific, but…"「this is completely unscientific, but…」（這完全不科學，不過…） before offering a hunch然後才丟出一個直覺猜測。That is a polite way這是一種禮貌的方式 of admitting in advance事先承認 that they cannot back it up自己沒辦法證實。Doing so這麼做 makes the remark harmless讓這句話變得沒有殺傷力。

The word is formal and mostly written.

The word is formal and mostly written這個字很正式，主要用在書面。

Note that it does not mean "not about science" — a poem is not unscientific, it is simply not science. To be unscientific, a thing must be trying to be reliable and failing.

Note that it does not mean注意它不是指 "not about science"「not about science」（跟科學無關）——a poem is not unscientific一首詩不是不科學, it is simply not science它只是本來就不是科學。To be unscientific要算是不科學, a thing must be trying to be reliable and failing這東西必須是想要做到可靠卻失敗了。