“Just because you don't understand something doesn't mean that it's nonsense.”
“Just because you don't know something doesn't mean it's not true.”
“Just because you don't understand it doesn't mean it isn't so.”
“Just because we don't understand doesn't mean that the explanation doesn't exist.”
“Just because you can't see something doesn't mean it's not there.”
“Just because you don't believe it[] [...]doesn't mean that it's not true.”