Quote Originally Posted by Throbert McGee View Post

P.S. Oops, I just thought of one example where my "when in doubt, use that" rule-of-thumb doesn't work -- when the antecedent is a proper noun, such as "John" or "Mrs. Smith" or "the HMS Titanic" or "Ukraine" or "my dog Spot," etc. In such constructions, "John" and "Mrs. Smith" and "Spot" would take who, while "Ukraine" and "Titanic" would take which:

"I have a dog named Spot, who loves to eat his own poop"
"I have a dog that loves to eat his own poop"
Looks like medved's rule works well here.

"which" adds unnecessary information to an object, while "that" selects the object from the range of all possible similar objects
Rephrasing: "I have one of the dogs that love to eat their own poop"

Will the phrase "I have one of the dogs who love to eat their own poop" be also acceptable?