You ask the first one, “Do you always tell the truth?”
Both will answer, “Yes”
You ask the second, “What did he say?”
If second is the liar he’ll say, “No.” If second tells the truth he’ll say, “Yes.”
You ask the first one, “Do you always tell the truth?”
Both will answer, “Yes”
You ask the second, “What did he say?”
If second is the liar he’ll say, “No.” If second tells the truth he’ll say, “Yes.”