I'm was merely pointing out that it seems you're stepping farther and farther out of boundary of what is intrinsic to the true paleo lifestyle and diet. (freetheanimal.com)
I would guess some sort of boundary between true vacuum and quantum vacuum. (religion.blogs.cnn.com)
And he pointed out how many such breakthroughs grew from teamwork pushing boundaries of understanding in ways where chances of failure were far higher than chances of success. (dotearth.blogs.nytimes.com)