If it quacks like a duck, it's a duck.

But this regimental fashion is now the order of the day, and the young generation growing up among Belgrave Squares, Eaton Squares, Lowndes Squares, Chester Squares, and their humbler imitants, may think differently from what we do.

I caught sight of him out of the corner of my eye.

This polytope has 16 tetrahedral cells, and for this reason it is called the 16-cell. […] The 16-cell has 24 edges that are the diagonals of the 24 square faces of the hypercube. (Since we are selecting alternate vertices of the hypercube, we only get one diagonal for each square face.)