if the third man were telling the truth and eiher road [was/were] fien, then the directinal answers of the first two would be either both true of both false. since the first two contradict each other, the third man must [instead/instead of] be lying.

맞는거 골라주시고 그 이유좀 가르쳐주세요ㅠㅠㅠㅠㅠㅠ