neurospast -
Your statements actually make a significant point for EBP.

You state the Tinetti is an EBP tool, but then go on to state that has not been proven to have any predictive value for falls. As an EBP you realize that this tool has faults, i.e. no validity for the ability to predict falls, and are more than likely using other examination tools to help ascertain whether the patient you are examining is at a high risk for a future fall. This is the way an evidence-based practitioner works - they are familiar with the measurement properties of the tests they use, and use other additional test when appropriate. When there is a lack of evidence to support any test, they use their clinical reasoning to determine the apporiate way to predict, in this case, the liklihood that a patient will experience a fall.