What is your answer to a scenario in which a woman using birth control properly in a loving monogamous relationship becomes pregnant when neither party wants a child? The most common form of birth control (the pill), when taken properly only has a 97% effective rate. Pair that with a second form of birth control (i.e. the pullout method) and it will go up but it will never be 100% effective.
It fluctuates based on workload, but I find myself working anywhere from 4-5 hours a day to basically nonstop during my workday (9 hrs). I do think most people are really only capable of doing “good” work, meaning being at their most productive, for about 3 hours a day though. The rest of the time is spent slogging through and putting out mediocre work, just to get it done.