People should keep promises to show respect to the person you promised something to and to make a commitment to them in some way.
Some can but it all depends on the guy. But we are all human and the odds of that happening is very slim.
I believe that allot of times technology does keep its promised but some of it relies on your standards
a promise breaker
The Jews had no promises to keep but they made a law (A commandment) to not do certain things. Back then, Jews used to ask people if they were Jews and if they were, They would take them, ask where...