Billions of people across the globe embrace beliefs not based upon reason or evidence, but based upon faith. By doing this, faith is committed to an epistemology. This way one can draw conclusions about things and make declarations such as "I know God exists by faith". But let's not isolate this to mere god beliefs, this applies to any faith position. These would include paranormal claims, such as psychics or mediums, ghosts, or even those whom believe there are unicorns on Pluto. Definitions are in order here and since definitions are arbitrary, they are granted what is known as a priori true status which is to say that any definition is a *true* premise. The philosopher Friedrich Nietzsche quipped "Faith is not wanting to know what is true", I've attempted to use the Biblical notion of it without the allusions or poetry.
Faith - Belief in something one cannot observe or reasonably conclude.
Reasonable - Having sound reasoning.
P1) Reasonable implies having sound reasoning. (R → SR) [definition, a priori]
P2) Faith is absent sound reasoning. (⌐SR)[definition, a priori]
C) Therefore faith cannot be said to be reasonable. (⌐R) [modus tollens]
A very basic syllogism to demonstrate the falsity of the claim that "Faith is Reasonable" given that you embrace these definitions. If you think I've been uncharitable to faith, proctor a definition you think sufficiently describes faith as well as any arguments you think support the idea that faith is reasonable.
What say you, VgChartz, is this faith thing reasonable?
EDIT: *sound* reasoning entails that it not only follows proper form (valid) but the premises of the argument are actually true.