It can be, but that is not its fundamental meaning. It's primary meaning is "confident belief in the truth, value, or trustworthiness of a person, idea, or thing." As such, faith requires evidence, just like science does. That is what I am talking about when I say faith must be capable of testing, just like science. But there are certain statements and assumptions that cannot be tested for their veracity one of them is as follows: "Science can only observe natural phenomena."