выяснилось, что он ошибся it developed that he had made a mistake
3. enucleate 4. explore 5. inquire into 6. bring to light 7. see 8. study out 9. thrash out, thrash over (вопросы и т. п.) 10. ventilate (вопрос) 11. enquire into 12. clear up (дело) 13. find out
узнать правду to find out the truth
Phrases with выясняют
выяснять вопрос с have a question out with (кем-либо)