It only makes sense to worry about the time it takes to put on a seat belt if it actually results in a delay in our progress.
It is very appropriate to worry about seat belts all the time since it is vital to our survival.
mnli hypothesis: It is very appropriate to worry about seat belts all the time since it is vital to our survival. premise: It only makes sense to worry about the time it takes to put on a seat belt if it actually results in a delay in our progress.