Scientific method refers to a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. To be termed scientific, a method of inquiry must be based on gathering empirical and measurable evidence subject to specific principles of reasoning. The Oxford English Dictionary says that scientific method is: "a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses."
source: http://en.wikipedia.org/wiki/Scientific_method
in·fal·li·ble adj \(ˌ)in-ˈfa-lə-bəl\
Definition of INFALLIBLE
1: incapable of error : unerring
2: not liable to mislead, deceive, or disappoint : certain
3: incapable of error in defining doctrines touching faith or morals
source: http://www.merriam-webster.com/dictionary/infallible
