What science-fiction technology would Germany need to make Operation Sea Lion work?
Short answerTransporters or replicators would solve the cross-Channel supply and production failures that bombing alone could not overcome.
NotesTransporters would let Germany bypass the vulnerable Channel crossing and deliver troops and supplies directly where they were needed for Operation Sea Lion. Horses would still have a purpose if supplies needed to move after arrival. Replicators address the separate problem of producing enough equipment to support an invasion. The suggested use is to reproduce a workable tank in overwhelming numbers, although the accompanying joke expects German designers to keep pursuing more complicated weapons. These deliberately impossible technologies address transport and production requirements that destructive bombing alone would leave unsolved.