SENSIBLE
in one's right mind
sane; rational and sensible. (Often in the negative.)That was a stupid thing to do. You're not in your right mind.You can't be in your right mind! That sounds crazy!
presence of mind
calmness and the ability to act sensibly in an emergency or difficult situation.Jane had the presence of mind to phone the police when the child disappeared.The child had the presence of mind to take note of the car's license number.
stand to reason
to seem reasonable; [for a fact or conclusion] to survive careful or logical evaluation.It stands to reason that it'll be colder in January than it is in November.It stands to reason that Bill left in a hurry, although no one saw him go.