[MD] subject / object logic

[craigerb at comcast.net]

[David]> Dinosaurs...can't...[think] about an earth, its history, its ability to> contain fossils, etc. That takes culture...Dinosaurs would not have conceived> of or experience any 'earth'. 'Earth' is a complex concept, and needs more> than an exerience of jumping up and down on something flat...When we say, e.g., "dinosaurs weighed over 2 tons on earth 100 million years ago",we are not claiming dinosaurs had the concepts of earth, numbers, time, scales,etc.  That statement makes sense & is true or not, because WE have those concepts.If dinosaurs did weigh over 2 tons, that is a measure of the gravitational pull ofthe earth that they experienced.Craig