The paradox of the Fermi problem is that the universe's vast age and size should make alien life common, yet none has been observed.
费米悖论在于，宇宙的古老和广袤本应使外星生命普遍存在，但至今却未观测到任何迹象。
Which choice best defines “paradox”?
A — Contradiction; puzzle; anomaly. “paradox” means contradiction; puzzle; anomaly.
Which word means “contradiction; puzzle; anomaly”?
C — paradox. “paradox” means contradiction; puzzle; anomaly.
paradox — contradiction; puzzle; anomaly. In Chinese: 悖论，似是而非的说法.
paradox is pronounced /ˈpærədɒks/.
The paradox of the Fermi problem is that the universe's vast age and size should make alien life common, yet none has been observed. (费米悖论在于，宇宙的古老和广袤本应使外星生命普遍存在，但至今却未观测到任何迹象。)
contradiction, anomaly, puzzle — all close in meaning to paradox (contradiction; puzzle; anomaly).
consistency, truism — each the opposite of paradox (contradiction; puzzle; anomaly).
Yes. paradox is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
para-(opposite) + dox (viewpoint) → paradox, contradiction.