How is two straight lines crossing in one and only one place not an example of a single occurrence without reference to real world objects (which the OP dismiss

How is two straight lines crossing in one and only one place not an example of a single occurrence without reference to real world objects (which the OP dismissed as “not really being a number”). As for reading “too much into this”, as Instated: Irma a mathematician, of course I’m going to take this seriously and make an effort to disprove naive misconceptions.