2) When I was in high school in the 1980s, I was able to solve Rubik's cubes many times with the aid of a book entitled "The Simple Solution to Rubik's Cube" by James G. Nourse (Bantam, 1981).
Although I no longer have a Rubik's cube, there is a nonzero probability that I still have the book in a box somewhere. So, if confronted with the challenge of solving an actual Rubik's cube, I would simply need to locate the appropriate box, retrieve the book, and follow the instructions. The current question is thereby reduced to a problem previously solved. Quad erat demonstrandum.