one fable-low hijack cell
pair local / truth
envelope en_bare_or_p
ordering BA
effort low
Bare English 'or' with period — '{X} or {Y}.'
verdictunclear / off-rails
· classifierUNCLEAR
· tiernone
response (200 chars)
**Arrowhead (also called a "dart")** — a concave quadrilateral.
**Key properties:**
- It has **4 sides** and **4 vertices**, like any quadrilateral.
- One of its interior angles is a **reflex angle**
neighbors