I kind of despise the time cone answer because it doesn’t actually answer the question. It transforms the question into a picture and uses the picture as the answer which is circular logic.
“Why do thrown objects fall in a parabola?”
“See here’s a graph of a equation. If the object is outside the graph it’s not on the parabola and that’s why thrown objects fall in a parabola shape.”
I don’t think in this case the logic is circular, it just explains how the light cone shows that FTL breaks causality, and assumes that you’ll learn the math behind the light cone somewhere else. Maybe the author assumes the light cone can be better learned from other sources
Regarding B someone linked this a week or so ago. It’s kind of technical but it does explain it https://www.physicsmatt.com/blog/2016/8/25/why-ftl-implies-time-travel
I kind of despise the time cone answer because it doesn’t actually answer the question. It transforms the question into a picture and uses the picture as the answer which is circular logic.
“Why do thrown objects fall in a parabola?”
“See here’s a graph of a equation. If the object is outside the graph it’s not on the parabola and that’s why thrown objects fall in a parabola shape.”
I don’t think in this case the logic is circular, it just explains how the light cone shows that FTL breaks causality, and assumes that you’ll learn the math behind the light cone somewhere else. Maybe the author assumes the light cone can be better learned from other sources