不可否认，…（但）…
admittedly …, (but) …; there is no denying that …, (but) …
Structure
不可否认（的是） ， 你承认的事实 ， 但／然而／可是 你真正的观点
What it means
Admittedly …, but …: you first grant a point the other side would make, to show you are fair, then turn to your own point, which carries the weight.
How it is built
不可否认（的是）+ conceded fact + 但／然而／可是 + your real view: 不可否认，网购很方便，可是也让不少人乱花钱 (online shopping is convenient, admittedly, but it makes many people overspend).
When to use it
Essays, commentary, debates, formal speeches; in conversation say 确实…，不过… or 话是这么说，但…. Like 固然…但…, but it heads the sentence and sounds more emphatic. Variant: 无可否认.
Watch out
What follows 不可否认 is the point you concede, not the one you are arguing for. In an argument, leave out the 但 turn and the sentence feels unfinished.
Examples
不可否认，基因编辑有望治愈不少遗传病，但它并不完美。
Admittedly, gene editing may cure a good many hereditary diseases, but it is not perfect.
不可否认，网购给生活带来了很多方便，可是也让不少人养成了乱花钱的习惯。
There is no denying that online shopping has made life much more convenient, but it has also got a lot of people into the habit of spending money carelessly.
不可否认的是，这座城市这几年发展很快；然而，房价也涨得让年轻人买不起房。
It cannot be denied that the city has grown fast these last few years; yet house prices have risen so far that young people cannot afford a home.
Learn this in Lesson 179 · HSK 7–9: 克隆猴与基因编辑 (Cloned monkeys and edited genes)
A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. The first lessons of every level are free.
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