[aianus]

I have some kind of psychological problem where I chew 5x more than normal people. This causes me to fill up on very small quantities of food and it's very difficult to hit 2000 calories a day without eating a lot of small meals or taking liquid supplements. So, at least for me, a liquid diet would be highly desirable.

As for biologically normal, it all turns into a liquid sludge in your stomach, doesn't it? Past that point I don't see how your digestive system can tell the difference as long as the composition of the sludge is similar enough.