What is the basis for the Jesus Seminar's search for the "Historical Jesus" movement?

"The Jesus Seminar was a group of about 50 critical biblical scholars and 100 laymen founded in 1985 by Robert Funk that originated under the auspices of the Westar Institute. The seminar was very active through the 1980s and 1990s, and into the early 21st century." -from ***[Wikipedia](https://en.wikipedia.org/wiki/Jesus_Seminar).*** Following is the Jesus Seminar's version of "Lord's Prayer. Members voted in secret by using 4 different colored beads on each phrase of the Lukan version. E.g.: - Red - Jesus said; - Pink - Sure sounds like Jesus; - Gray - Well, may be; - Black - There's been some mistake. (from [Unmasking the Jesus Seminar](https://www.patheos.com/blogs/markdroberts/series/unmasking-the-jesus-seminar/) by Dr. M.D. Roberts)