They are limited to what they have access to and therefore to whit forsooth think others are similarly limited too. And so it goes. Measuring others by yourself and finding THEM wanting is what homo saps always do. "If there were a better way to do I'd be doing it". "If there were a more perfect way of thinking I'd be on top of t". Of course that is absurd as are all such pronouncements. We function as best we can despite our limitations. Where we err is projecting our limitations onto others. We are not all alike. Thankfully.Some float. Some race. Some drown. That's life.
