“Did I wash my hands?”
“You better wash them again just to be safe.”

“I locked my car right?”
“I think so but, just to be safe, you should check it.”
“I’m sure I locked it.”
“Better check one more time.”

“Did I turn off the stove?”
“We should check, just in case”.
“Ok, but we’ll have to unlock the front door first.”
“The stove is off.”
“Are all of the lights off?”
“Yes, they are.”

“Did we lock the door?”
“Yes, do you want to check again?”
“Yes, better just make sure to be safe.”

“Are my car lights out?”
“Let’s check just to be safe.”