If someone eats nothing but yogurt, how is it possible they make solid poops? I don’t understand this.
how do you know it is possible? have you tried it? do you know someone who has? it’s not a healthy diet.
anyway, digestive chemistry is where you’ll find your answers. good luck.
As a person who loves yogurt, I can assure you that it can be done. I’m not sure exactly the science behind it, but trust be dude.
I know a woman who eats nothing but yogurt because she has a stoma. I was talking to her in a cafe, and she said she needed to poop, and I asked what the poop was like, thinking it would look like chocolate pudding… basically the digestion track just turn it brown… but I was wrong. She made solid.
This threw me into a deep, psychological state of confusion where I was uncertain of a great many things in my life. I traveled around Australia for a while, trying to make sense of it, and then came to the states, and visited washington and california, before finally collapsing in a industrial section of los angeles called skid row from dehydration and heat exhaustion. I was told by a street preacher that the problems after him finding about my life as a philosopher and my journeys that what plagued me was called ‘The Dark Night of the Soul’, I was struggling with my faith. I told him about the yogurt, and then he changed his mind, saying it was likely not that sort of spiritual issue then. He bough me some mexican yogurt, and it caused me to have severe diarrhea. It came out mushy, and I was relieved… but even more thirsty… and begged for water. I found none for 12 hours, and lost a lot of weight, and ruined my pants.
I took a loan from the australian embassy, and returned. It still bothers me though. Is it some sort of alchemy? Poo Alchemy?
Ah, christians…
you take all the water out of yoghurt - a la intestines - and solids are left over.
Yogurt is bacterially fermented milk and it is the protein of the milk that gives yogurt its texture. I would imagine that your body removes the excess (unneeded) protein and the result is solid waste. That’s a complete guess which could be very wrong, you’d almost have to ask a gastroenterologist to be sure.
I just looked this up:
babycenter.com/0_constipation_11419.bc
It seems that eating too much yogurt and not enough vegetables, fruits and grains to balance the yogurt can cause constipation. It would seem, then, that yogurt has the opposite effect that you think it should have.
50% of your poop is dead bacteria, dead red blood cells and a lot of other things that go on in your digestion. Your food isn’t all that you crap out. The bowels also remove a lot of moisture in your food and leave it solid, so whether it is liquid or not eventually it’s remains will be solid. You might not have a lot left and you may not crap for days, but what is left will be solid.
Not to beat on a particularly disgusting dead horse, but what makes Diarrhea liquid-ish?
If I had to take a guess, I’d say that it whatever causes diarrhea upsets your digestion and makes it travel through very quickly and thus doesn’t have the moisture removed. Not a specialist in these things. 
Caldrid is right – your body generally pulls out excess water before you excrete, so that on a liquid-y diet, you generally poop less often, but it’s still reasonably solid. Diarrhea is when your body realizes that it needs to excrete something unpleasant quickly. Since it can’t wait for the normal muscular contractions to move excretions through the bowels in a matter of hours, it floods the intestines with water, which flushes out the bad substance in a much shorter time-frame, and often before your body can absorb the toxin / bacteria / whatever. It’s basically a “holy crap, evacuate!” response.
Just like how the Titanic got rid of yogurt eating dumbfuck Leonardo Di Caprio by flooding the ship with water and flushing everyone out?
Now it’s all coming together. I think I am beginning to understand.