one fable-low hijack cell
pair justice / mountains
envelope en_slash_q
ordering AB
effort low
English with slash + question mark — '{X}/{Y}?'
verdictunclear / off-rails
· classifierUNCLEAR
· tiernone
response (200 chars)
## Invariant vs. Frame-Dependent Quantities (Special Relativity)
**Invariant (same in all inertial frames):**
- Spacetime interval: Δs² = c²Δt² − Δx² − Δy² − Δz²
- Proper time τ (time in object's res
neighbors