I think liars should have good memory powers.

Yeah I agree with you coz they must remember all the lies they said. For them not to accused a liar they must be consistent in what they say coz this is the time they can recognized if the persons is a liar.

It depends, ssh. You know, not all liars are enjoying good memories. Some can not remember the exact lies they have told, but some can. For those who can, there should be no problem for them to repeat the same lies again and again. But for those whose memories are less good, their lies will not always match what they say and it will be very easy for people to recognize their lies. Do you agree, my friend? Have a good day.

That is one of their assets, otherwise they cannot be in trade of lying.