I would suggest rather that if faith is not justified it is superstition. One could say that faith is the knowledge of what could be but is not yet.
Knowledge is the use, classification, or development of information, that enables us to make sense of the world and develop our belief system.
If, say I were to say that we know there never was a moon landing because they never came back with green cheese.
You could conclude that either
a) the moon is not made of green cheese, or
b) the moon is made of green cheese and the astronauts secretly ate it, or
c) I am labouring under a misapprehension.
The conclusion that you draw is based on your knowledge, your understanding, and your belief, and your belief in this case is what you accept as true.