Q: someone told me "i am lying" and then asked me to say if it was true or not what do you think
A: i'd say it alternates over time, at a rate of one switch per the smallest possible time-unit. which is currently thought to be something called the Planck time. So, in other words, every 0.0000000000000000000000000000000000000000000539 seconds the statement should switch from true to false, or from false to true, because that would be the soonest possible time that anything could change, and intrinsically the statement is always due to invert.