Which system of glyphs on Easter Island remains undeciphered?

• A. Rongorongo
• B. Toynbee Tiles
• C. Voynich Manuscript
• D. Solway Spaceman

Answer: (A)

Rongorongo is the system of glyphs carved on wooden tablets and other objects from Easter Island. It remains undeciphered because there’s no widely accepted decoding, and the surviving examples are limited and don’t come with a bilingual text to lock in what the signs mean. Researchers have proposed various readings, but none has achieved consensus, so the glyphs’ language and messages stay a mystery. The other options aren’t tied to Easter Island’s glyph tradition—Toynbee Tiles are modern urban inscriptions, Solway Spaceman is a hoax photo, and the Voynich Manuscript is an entirely different, undeciphered text from Europe—so they don’t represent the Easter Island script in question.