For although when it is said, Draw a line it obviously sounds more correct to add in indefinitum than if it were said in infinitum, be cause the first means a no more than Extend it as far as you want, but the second meansb You ought never to stop extending it (which is not at all intended here); yet if we are talking only about what can be done, then the first expression is entirely correct, for you could always make it greater, to infinity.