The source of the ridiculous 'almost certain' came from the following extract submitted to FCL.008 by one of its UK members, who also admits to proposing the Chocolate Teapot Rating:
I came up with the concept of an En-route Instrument Rating. This would allow access to all classes of airspace in line with the EASA principal that license privileges should not be defined by airspace class.
The associated weather limitations would be such as to make it almost certain that a departure and arrival could be conducted under VFR.
Read FTN and/or GA to find out more......