I’m very confused by Euclid’s definition 4 in Book 1 of a straight line
- A straight line is a line which lies evenly with the points on itself
I’ve read elsewhere that Euclid’s axioms aren’t as complete / formally defined as in other texts. But I’m curious if I’m simply reading this wrong.
By this definition, wouldn’t every line be a straight one? Do not all lines lie evenly with the points on themselves?