An empty sentence

When the false is true, it is true;

Only inaction. -"Fantasy couplets" in Cao Xueqin's Dream of Red Mansions

It means: there is no distinction between true and false. When you regard the real thing as illusory, the false thing is more real than the real thing. When you say that things that don't exist are things that exist, the fabricated facts are even more real than the existing facts.