It's a semantic saying that misses what people typically mean when we speak about simultaneous events. Someone sends an email or speaks on a voice call on the

It's a semantic saying that misses what people typically mean when we speak about simultaneous events. Someone sends an email or speaks on a voice call on the other side of world and a receiver still gets that note at the speed of light, there is slight latency. It's still completely reasonable to measure that latency as we can effectuate improvements to our machines and networks when it increases. The same as if someone wrote a letter in the 1860s and the horses were sick, causing a delay. Simply because information was received by us, the common understanding is that the notification was sent previously, because that is how cause and effect work.