Hello,

I think there is a confusion. <" is not a hook, it's an adverb, because < is a verb and " a conjunction, and so technically <" is a partial application of a conjunction. More generally, if you have a conjunction C, uC is the adverb V such that [x] v V y is [x] u C v y and, similarly, Cv is the adverb V such that [x] u V y is [x] u C v y.

This is not to be confused with a hook, which is only about verbs (to keep it simple). You would have a hook if " was a verb.

So, to answer your question, (<") is an adverb, and 0(<")y is <"0 y (according to the above definition).

--

Adrien Mathieu

On 10/10/2021 21:43, P Padilcdx wrote:
J noob so pardon the noob question. As the subject indicates, I’m confused as to how 
or why <“0 y turns into 0(<“)y when interpreted as a hook. Looked at the Primer 
and LJ and they don’t really explain the jump between the “0 to the left” and the “0 
to the right” transposition when a hook.  Any pointers would be appreciated.

Regards
Pete
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