Someone has just approached you and claimed that you don't exist — instead, you are an imaginary person that he has dreamed up. How could you use logic, rather than evidence provided by your senses, to prove that you exist?

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

they were all fought in the middle east during ww1