Einstein was the discoverer of spatial-temporal relativity. Let "Einstein" (Einstein's name surrounded by quotes) be the name of him and his achievements together with other revolutionary scientists of the 20th century and their equally surprising discoveries (such as Bohr, Schrödinger, Heisenberg, Dirac, Fermi, etc. through S. Hawking). So, when I say that "Einstein" is a 20th century scientific achievement of a very peculiar nature, I am not talking just about Einstein, but also his results plus other noteworthy scientists and their results. Analogously, I will use Magritte's name with quotation marks added to refer not just to Magritte and his artistic achievements, but also to many other modernist 20th century artists and their achievements (e.g., Picasso, Duchamp, Pollock, Dali, but also Calder, Schönberg, Escher, Le Corbusier, Bausch, Maplethorpe, and many others).