Jim Kelley wrote:

It's fairly safe to make this argument when both pulses are identical.
I challenge you to obtain this result when they are not. :-)

73, Jim AC6XG

I proposed this some time ago, and got the response that dissimilar
pulses would still bounce off each other, yet appear exactly as though
they were passing through without interaction. I haven't been able to
understand why this would be, but there are no mathematics to explain it.

Roy Lewallen, W7EL