I have signed no contracts or agreements whose existence I cannot mention.
They thought they found in numbers, more than in fire, earth, or water, many resemblances to things which are and become; thus such and such an attribute of numbers is justice, another is soul and mind, another is opportunity, and so on; and again they saw in numbers the attributes and ratios of the musical scales. Since, then, all other things seemed in their whole nature to be assimilated to numbers, while numbers seemed to be the first things in the whole of nature, they supposed the elements of numbers to be the elements of all things, and the whole heaven to be a musical scale and a number.
Here is the claimed Gorard’s “alien logic system” in the linked tweet
I had Claude chew on this for a bit, and Claude determined that this proof system was the trivial one (ie ∀a,b:a=b) by writing a script in SPASS (an automatic theorem prover) to try to prove this statement.
Here is the SPASS proof
Here is Claude’s proof summary
Proof sketch (from SPASS, depth 3, length 23):
Axioms 1 & 2 ⟹ a ⊕ (a ⊕ b) = b ⊕ (b ⊕ a) [step 15: “symmetrized absorption”]
Substitutions into Axiom 3 + rewrites ⟹ a ⊕ (a ⊕ b) = b ⊕ a [step 173: “double apply = flip”]
(1) + (2) ⟹ a ⊕ (a ⊕ b) = a ⊕ b [step 174: idempotent-like]
(2) + (3) ⟹ a ⊕ b = b ⊕ a [step 209: commutativity]
(4) + earlier lemmas ⟹ a ⊕ b = a [step 228: left absorption]
Rewrite Axiom 2 with (5) ⟹ a ⊕ b = b [step 229: right absorption]
(5) + (6) ⟹ a = b ∀ a,b ∎
Therefore I think its quite likely that many of the supposedly rich alien axiom systems Gorard found are actually just trivial almost-contradictory systems which are hard to prove the triviality of. It also explains why he couldn’t “make sense” of the system. There is nothing to make sense of.