The speed of the spaceships cannot take the speed of light c
Here is a comment for the youtube videos for this article: "No object can reach the speed of light, so the speed of the spaceships in the example cannot take the speed of light c."
Of course, no one reading this paper will ask such a question.
The incompatibility between Galilean velocity transformation and Special Relativity's velocity transformation can be clearly seen from their formulas.
The speed 1c, 2c are there just to make the paper more comprehensible to the general public, because numbers 1 and 2 are much easier to understand than any formula.
And by the way, if we were to take all conclusions from Special Relativity as absolute truth, what is the point of this paper?