If your definition of "blind faith" is broad enough that accepting things on "blind faith" is actually a good, fairly reliable predictor of possible future observations, then I think you should get a narrower definition.
For example, I accept on "blind faith" the fact that Australia exists. But if I got on a plane to Australia, I have every reason to expect that it will go to a real place called Australia, rather than secretly taking me to Botswana or something. By your definition, a belief in Australia and a belief in unicorns are both lumped under the category of blind faith, which I think is a really silly classification.
All our observations of the world -- even sight, sound, smell, and so on -- are indirect. Your eyes don't see all wavelengths, and they can be tricked into confusing combinations of red, green, and blue as "the same color" as a pure wavelength of light. And don't get me started on the preprocessing that happens before the signals even reach your brain! Will you categorize everything you see as being taken on blind faith as well? Where do you draw the line?
"a belief in Australia and a belief in unicorns are both lumped under the category of blind faith, which I think is a really silly classification."
I'm not lumping them together. Lots of people that I trust tell me they've been to Australia. I don't have any reason to doubt them. I trust them, so accept that Australia is there. Lots of others also publish pictures, movies, etc so I trust them too. But that's a belief, not a knowledge -- I _personally_ have no evidence at this point.
Nobody I know professes to have seen a unicorn. I also have no personal evidence, so I don't believe that.
And like I said above, I'm not trying to go to the point of whether we can trust our senses, or know whether or not we actually exist or any of that. I'm just trying to show that individually, each of us live our lives with 99% belief (ie no personal experience/evidence), and 1% knowledge (things we've personally experienced).
Let's take the atom. How do YOU KNOW that atoms exist? What personal experience/evidence do YOU have that they exist? We both believe they exist, but neither of us have split one and know for a fact that there is a nucleus in there. We both choose to believe, based on the coherent story we hear from many other sources.
For example, I accept on "blind faith" the fact that Australia exists. But if I got on a plane to Australia, I have every reason to expect that it will go to a real place called Australia, rather than secretly taking me to Botswana or something. By your definition, a belief in Australia and a belief in unicorns are both lumped under the category of blind faith, which I think is a really silly classification.
All our observations of the world -- even sight, sound, smell, and so on -- are indirect. Your eyes don't see all wavelengths, and they can be tricked into confusing combinations of red, green, and blue as "the same color" as a pure wavelength of light. And don't get me started on the preprocessing that happens before the signals even reach your brain! Will you categorize everything you see as being taken on blind faith as well? Where do you draw the line?