While I'm a Muslim myself, I have to say that I can see quite a few problems with this concept:
"Having faith" in any idea, concept, or religion is not as malleable as this 'test' seems to imply. Take dragons for example: I don't think Islam would have any negative views on the existence of dragons; it doesn't state that dragons exist, but it also doesn't say anything about their nonexistence. Its stance on the existence of dragons is neutral, so were I to try to convince myself that dragons do indeed exist, I wouldn't be going against my religion's teachings.
However, I still wouldn't be able to do that. There is not a single reason that I can see that supports the idea that there are dragons out there, and even if I did try to believe that they exist, my mind would simply not digest the idea -- regardless of what I
want or
try to believe.
Let's say that, somehow, I manage to find it in me to be open to the idea that dragons exist, but am only unconvinced due to the lack of sufficient evidence. Now, I go around looking for evidence to support my claim -- I
want them to exist -- and I see the "evidence" I was looking for. The problem is that said evidence doesn't hold up to logical, empirical, or even experimental standards; I saw what I wanted to see, not what actually qualified for evidence.
Would this be a tenable position, from a logical and/or rational standpoint? What is the difference between my search for evidence to support the existence of dragons and say... someone else's search for evidence to support claims about the existence of extraterrestrial lifeforms? Why would either of us be any more correct than the other, when the "evidence" only exists from our viewpoints as an ad hoc for an already-existing bias?
Assume that, after a prolonged search, I finally end up believing that dragons exist because I "opened up" to the idea, searched for evidence to support it, and presumably found said evidence. The premise itself -- trying to be more open to the idea of dragons' existing -- seems to indicate a readiness for accepting confirmation bias: I didn't go out there with nothing particular in mind and then found evidence suggesting that dragons exist (and hence my hypothetical belief in their existence); I went out there with a particular bias and only found what I was looking for. Rather than experimentation, logic, or evidence leading to my conclusion, my conclusion lead to my finding the supposed "evidence". That is not really evidence; that is confirmation bias and a classical example of an ad hoc.
Those are my two cents, but anyone is still free to try finding evidence for dragons, of course.