You can explain everything using three basic symbols:

use one symbol for everything: (+);

use one symbol for the opposite of everything: (-);

use one symbol for opposite directions: (√ )

That is (appealing to consistent usage in both science and mathematics):

(opposite directions, aka gravity): one point is not another (plural): (→←)

everything (including exclusive points) excludes its additive inverse:

(additional evidence): any other model (as disprovable) must prioritize negative one as amounts to zero; for example (including, rather than excluding, the additive inverse):

In summary: on this website we have illustrated perfectly opposing models (as immediate); the first excludes the additive inverse; the second includes the additive inverse; that is (deriving the first law of thermodynamics): zero-centric models remain disprovable by strictly additional squaring: (+): (→←)