So there's \in, \subseteq and probably many others that are written just like in Latex. Notably \cap and \cup were also copied from Latex, which describe the shape of the symbol instead of its meaning. But not \to, \mapsto, \Vee and \Wedge, they're written as ASCII art ->, |->, \/ and /\.

Then there's SUBSET, which means power set ... yeah. -_-

"to prevent multiple from" seems to be missing a word.

You run into Rices theorem if you try to apply it too heavily.

I made https://github.com/RCSnyder/tlaplus-process-studio

https://tlaplus-process-studio.com/

For local only high level modelling. Its not a full tie into the actual model checker, but its meant to serve as a first step into system modelling for state machine modelling for beginners