I don't remember where I read this, but the argument goes something like 
this:
 On a diet of mostly meat and fat, fiber is completely unecessary in the 
human diet, as our digestive systems are 100% capable of digesting even raw, 
unchewed meat and fat.
 Maybe I saw this here on the list. I don't really worry too much about 
fiber, to be honest, because I notice that the less of it I eat, the more 
"regular" I am. It's when I start eating all those fancy foods that my 
insides get all weird.
 Mike W.