I'd assume that it depends on the "top secret" -ness of the lab. In a large enough top secret lab, there is a diverse enough set of perspectives to still provid

I'd assume that it depends on the "top secret" -ness of the lab. In a large enough top secret lab, there is a diverse enough set of perspectives to still provide the sharing culture that ideas need to flourish. In a right-sized enough top secret lab, you can keep the "that's just too crazy, it'll never work" attitude out, while affording the isolation from real-world concerns necessary for "too crazy" to become "just crazy enough".