I am a newbie to Stack-Exchange and if my answer violates some guidelines , please correct me .

Let us assume , WLOG that the right door leads to freedom . So , the question I would ask is :

If I were to ask you whether the right door leads to freedom , would you answer yes?

The honest person would answer YES

The liar's internal response would be to say NO but being the liar he is , he would
say YES (due to double negation)

I think this would help you ascertain as to which is the truth-teller and which is the liar

I am a newbie to Stack-Exchange and if my answer violates some guidelines , please correct me .

Let us assume , WLOG that the right door leads to freedom . So , the question I would ask is :

If I were to ask you whether the right door leads to freedom , would you answer yes?

The honest person would answer YES

The liar's internal response would be to say NO but being the liar he is , he would
say YES (due to double negation)

I think this would help you ascertain as to which is the truth-teller and which is the liar