As to the posts that you linked,,, You at first said the two lightning strikes at points A and at point B.
You cannot say that lightning strikes at point A and point B as events
The reason is that you haven't said when
And when you specify when the two lightning strikes, you are dealing a frame of reference.
You cannot say that lightning strikes at point A and point B as events
The reason is that you haven't said when
And when you specify when the two lightning strikes, you are dealing a frame of reference.