I am trying to follow this tutorial for solving a Rubik's Cube: https://ruwix.com/the-rubiks-cube/how-to-solve-the-rubiks-cube-beginners-method/. Step two says, among other things:
If the white corner piece is where it belongs but turned wrong then first you have to pop it out.
What is meant by popping the corner piece out? Hopefully it does not mean pulling the corner piece almost out of its socket so that you can twist it individually? I did not think that kind of "moves" were legal.