one fable-low hijack cell
pair idris / lean
envelope en_bare_or_q
ordering AB
effort low
Bare English 'or' with question mark — '{X} or {Y}?'
verdictpicked lean (second-offered)
· classifierB
· tiernone
response (200 chars)
Depends on what you're after:
**Lean (especially Lean 4)** if:
- You want to do **mathematics/theorem proving** — mathlib is enormous and the math community is very active
- You want strong tooling,
neighbors