Very true. Being able to do routine things quickly and accurately without much mental effort reduces cognitive load that makes capacity available for tackling l

Very true. Being able to do routine things quickly and accurately without much mental effort reduces cognitive load that makes capacity available for tackling larger more complex problems. The other thing to note is that we are not only limited in size of what we can hold in our head, but also time. Not having to look up an easily found answer means that we can get to a solution before running out of time.