It was not digested
It is obvious that if you can see what you ate in the stool, it did not get broken down properly to pass through the intestinal wall&into your bloodstream. This could be good or bad.
The body obviously would not digest, say a coin accidentally swallowed by a child. But millions of american's have gut problems& are not digesting properly&are malnourished, esp. Overwt. Pts. Speak to your dr.!