By that metric absolutely all kids (and plenty of adults) are Psychopaths. Unsurprising, really, since it directly stems from being in an unequal dependence relationship (which is basically everybody) where direct conflict is not a workable option - kids and parents, wage slaves and their owners, people in relationships etc...
Incorrect.
While there are bursts of such behavior in most children, especially the more intelligent ones, children confronted with their lies and asked to explain them will often tell the truth. As I understand it, children lying is usually more identity boundry experimentation, than actual materialist investment.
More, some kids are more strongly predisposed towards accurate information relation from the get-go and, for a certainty, most adults do NOT exhibit the LACK OF EMPATHY AND CONSCIENCE necessary to REFLEXIVELY lie (without an INTERNAL CHECK ON BEHAVIOR) that psychopaths and sociopaths exhibit.
A certain amount of doublethink is required to lie, but that is not much of a factor for psychopaths, and it seems like they might not see the innate need for truth unless it is directly useful towards their goals, or direct consequences are brought upon them for lying.
Lying is not innately an unequal dependence relationship, though there is overlap, and cases where an individual is in a disadvantaged position will probably exacerbate the probability of lying. Lying also very often occurs when a person has power over others but simply doesn't feel any concern for telling the truth, or even just enjoys the experience of lying, if they are truly bent. Consider that the Nazis were in no way in a disadvantaged position, relative to the Jews in the concentration camps, when the Nazis lied and told them the gas chambers were regular showers.
An argument COULD be made, tho, that there is an unequal dependence relationship between the psychopath **and all of existence**, in that psychopaths engaging in lying to control people in order to feel they are powerful **in the face of what they likely perceive as an innately inimically chaotic universe** might be viewing the individual as being a small **and controllable** part of that universe. This supposition is, however, as previously noted, conjecture on my part, tho it does seem to comport with the pattern psychopaths notably and even characteristically oft exhibit.
I can go into that more but it would be much more developed discussion and not really correct material for this discussion thread.
I will also say that modern society, especially as propelled by social media, seems to have a unfortunate increasing trend towards rampant narcissism, which can indeed result in a more commonplace occurrence of dishonesty: a trend that a younger audience, brought up only experiencing a world full of social media, might then mistake for a natively commonplace state.
On the other hand, it could quite easily be that social media, like certain drugs, simply brings out the traits of a person that were already there beneath the surface. Nonetheless, there does seem to be quite a bit more, and more virulent narcissism in the world than there was prior to the predominance of Facebook, TikTok, etc.
This is definitely getting more and more off topic, though.