I think that we can dismiss 2. because they did make precision devices when they wanted to (see the Antikythera Mechanism). If this had been the limiting factor they should have been able to reach at least the level we had in the nineteenth century.
I think that we can dismiss 2. because they did make precision devices when they wanted to (see the Antikythera Mechanism). If this had been the limiting factor they should have been able to reach at least the level we had in the nineteenth century.