I first thought the flaw with twitter was that people tweeted insights with a minimal of background or literature research. This leads to shallow analysis of problems others have spent years thinking about.

I realized later that the more accurate flaw is not that, but correlated to that. The real flaw is that it's a breeding ground for low-effort takes. The person espousing some grand theory of life can tweet it after thinking about it for just a few minutes. This leads to theories that not only are not exposed to peer review, but theories that literally the writer herself hasn't spend more than a few minutes thinking carefully about.

If you only have to type 140-characters, you get both really great theories distilled, and fleeting thoughtlets.