my bad
17.10.2025 17:20
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my bad
Sounds similar to the way the GHC typechecker can promote metavariables to the top-level, e.g. when the monomorphism restriction applies. It's then the notion of type variable levels which avoids these promoted metavariables getting unified with skolems from an inner level.
terminal "everything is a dictionary" brain
there being a grammar of patterns, distinct from expressions, was one of the key "woah" moments for me with Haskell; that idea brings so much else into focus
it seems clear he hasn't had that insight (and certainly not experienced pattern matching in a dependently typed language either)