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Comment by justosophy | Hacker News Reader

Tree Calculus is awesome with implications beyond this website.

Shame the website doesn't attribute the creator and author Prof. Barry Jay. (Seems to be a pattern for them sadly, not sure why)

See Jay's book on GitHub for more https://github.com/barry-jay-personal/tree-calculus/blob/mas...

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Note that it refers to his book on the "Specification" page :)

> Seems to be a pattern for them sadly, not sure why

Can you elaborate? Agreed I could (and will) attribute more explicitly on the website, but the intention is in no way to grab credit. I just posted this reply for more background on everything: https://news.ycombinator.com/item?id=42375914

English is likely not your first language and it’s fairly obvious what you mean, but the word you’re using a lot is spelled “intention”. Not at all how it sounds, stupid English.

(It’s also likely that this minor error is spawned by the use of intension, a very uncommon word, in the description of Tree Calculus.)

As I understand, he uses both "intention" and "intension". "Intention" as a desire to do something, and "intensional" as opposite of "extensional": https://www.collinsdictionary.com/dictionary/english/intensi...

Ooops, thanks for catching, typo fixed. That Tree Calculus is intenSional (https://plato.stanford.edu/entries/logic-intensional/) is one of its main selling points, so that spelling must've rewired too many motor neurons.

Oh cool, his Bondi Language / Pattern Calculus was the first thing I thought of seeing this, so I guess I wasn't too far wrong.

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