 Craig says no, for in the actual world we do not start from now to arrive at the past; we move from the past to the present. To count backwards, we would start from a particular point in time, the present. From where would we start to count forward were the past indefinitely extendible? Both to count and to move from the past to the present, we cannot start from the indefinitely extendible. Indeed, if the past is indefinitely extendible, no matter where we started, we would have arrived at \(t_0\) long before now. 