I read this at Time.com, and it's in the second line of the third paragraph.
And wouldn’t you know it, their theory proved to be both true and statistically meaningful.
I suppose it means "And in case that you don't know, I tell you that their theory..." because I tend to understand it's structure this way:"And if you wouldn't know it, their theory..." But I only know words like 'were', 'had' and 'should' can be preposed in a subjunctive mood, and they are used to suggest an assumption.
e.g. Were I you, I would go back. = If I were you, I would go back.
And I think sentences like "Somebody wouldn't know something" suggest that He don't know nor care, but this sort of logic doesn't fit the context of the original sentence I quoted.
So here are my questions:
- How to comprehend the quoted sentence?
- When can/must I prepose an auxiliary?