Dr. April McConnick quotes M.D. Hooker from “On Using the Wrong Tool,” Theology 75: 570-581 that Judy Redman found: The Forbidden Gospels Blog: Why the Quest for the Historical Jesus Fails or “On Using the Wrong Tool” :

Neither must he the biblical scholar use them tools like form criticism negatively – to blackball a saying. The critic who tries with his knife to carve away the thick layers of the Churchs theology and give us the bare skeleton of the Jesus of history will no doubt shudder at my unscientific analogy, but it seems to me that all his criteria can only give us results like those which appear in the tables of the magazine Which?. The more blobs in the column, the more confidence one may have in that particular product, and the better buy it is. So with our gospel sayings. The saying which is found in all the Synoptic strata, which has no known parallel outside the gospels, which is Aramaic in structure, will perhaps rate more blobs than one which has none of these features. But I am not suggesting that we should assume that those which score so many blobs as authentic, and those at the bottom of the table are not. We are moving here only from the more to the less probable.

For in the end, the answers which the New Testament scholar gives are not the result of applying objective tests and using precision tools; they are very largely the result of his own presuppositions and prejudices…Too many hypotheses have been regarded as proved, and have become accepted as dogmas. Of course one must have working hypotheses; but it should never be forgotten that these are only hypotheses, and that they must constantly be re-examined. Perhaps every NT scholar should have before him on his desk, as he writes, as a constant reminder of the dangers of dogmatism, the words of R.H. Lightfoot: “We do not know.” [Emphasis added]

It is refreshing to see some scholars getting it. More at Judy Redman’s site: In Search of a Methodology.