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README.md

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+# Hoare Test
+
+This project is me teaching myself formal verification using Hoare logic in Rust
+
+## What is Hoare logic
+
+Hoare logic is about proving programs work correctly using this format:
+```
+{P} code {Q}
+```
+
+Where:
+- P = what must be true before the code runs (precondition)
+- code = the actual code I'm testing
+- Q = what will be true after the code runs (postcondition)
+
+It's essentially making promises about what the code does, then having the compiler check that I keep those promises.