Interesting definition. Do you mind telling me where you got it from? Personally, I prefer these dictionary definitions of the word
faith:
Dictionary.com: Belief that is not based on proof; e.g. "He had faith that the hypothesis would be substantiated by fact."
TheFreeDictionary.com: Confident or unquestioning belief in the truth, value, or trustworthiness of a person, idea, or thing.
MerriamWebster.com: Strong belief or trust in someone or something.
So, since science is admittedly fallible, since we don't know everything, and since we often times don't have proof, wouldn't you say that our leaping to conclusions based on incomplete information, regardless of how strong or accurate that partial information is, is faith, according to the definition of the word?
The scientific method is a tool for discovery and obtaining knowledge, and it often times isn't a very good tool due to our limitations. Faith is another tool, and we use it every day. We get up in the morning and go to jobs we don't like because we have faith that, come Friday, we'll get a paycheck. We spend a lot of time and money going to college because we have faith it will result in more knowledge, a better job, etc. We employ the scientific method because we have faith that it will increase our understanding of the world around us. Faith is a principle of action. Too many people mock faith as being a passive, religious concept and mistakenly define it as you have, and then go on to hypocritically embrace faith under the guise of science, I think.