ErrolTheDragon and raddledoldmisanthropist
Yes, I do think that the fact that the sciences in general deal with material questions means the methodology tends to guard somewhat against gobblygook. In that sense mathematics can be a better comparison with philosophical subjects as it isn't so attached to that kind of experimental or observational element.
Genuinely clever people use specialist language to convery meaning more clearly and precisely. They may pitch to different audiences but someone will know exactly what they mean and how their argument is supported.
I don't know if I totally agree with this. I do think that in humanities subjects like philosophy clear thinking is very important and language is used to that end. However, I'm not sure that the specialist language is always so clear or defined. Philosophers often use language in new or unique ways, and they don't always give a primer for that. Sometimes it's through reading the whole of their works, or watching the back and forth between two thinkers who disagree, that you really start to understand the way they are using language. And it can take years for students to really start to understand what they mean and begin to talk about their ideas intelligently, this is part of why traditionally we haven't expected anything really new or interesting from humanities undergraduates. Their job has been to begin to understand the whole intellectual tradition so they have some background to start to grasp and evaluate new ideas or interpretations or new uses of language.
Don't get me wrong - I think Butler has a few poorly observed truisms contained in her thinking and the rest is empty. The language use contains nothing, and a lot of people suspect that when they read it as we can see. But many people have also read really great thinkers and initially found them equally opaque, using language in odd ways, and it's only after considerable reading and study that they begin to make way in understanding them.
People like Butler depend on people giving them that kind of space. To me the question is, how did these charlatans get into the academy in the first place - why weren't they identified and weeded out along the way by all the people whose job it is to do that?