Type Safety in 10 Easy, 4 Medium, and 1 Hard Lemma using Step-indexed Logical Relations``` {-# OPTIONS --rewriting #-} module rewriting.examples.BlogTypeSafety10Easy4Med1Hard where open import Data.Bool using ( true...pl#semantic_typing#jeremy_siek#agda#type-safety#logical_relations·siek.blogspot.com·Feb 4, 2025Type Safety in 10 Easy, 4 Medium, and 1 Hard Lemma using Step-indexed Logical Relations