by
a) not dealing with them at all, as in, not having any business with such "people"
b) one-chance-policy. 1 lie/fuckup and i cut em out of my life except if they are not at fault and they do apologise afterwards (but mental notes are still done and i will see to it to end our relationship anyway)
im too precious and life is too short to waste my time and energy on such ignoble imbeciles. am i arrogant for that? maybe.
>stupid everywhere
if you dial down your self and open your perception to their ways, mimics, gestures, tone, vibration ect ect you truly will see that they are stupid almost everywhere, actually

of course exceptions can be made, if you feel like le ebin big humanitarian soul and got time and energy to waste on single individuals and teach them better ways in hopes.
some say the cure for stupid is death.
let them dig their own trenches, some enjoy their own pain.

>>34437998
Well, as they say, there are many different types of intelligence out there. A person who is a simpleton in one aspect can know how to handle others pretty well, and a academic genius may not know what to do at all, for example. It's not always the case though.

For better or worse, lying can be a powerful tool, and it is a tool even someone who is not traditionally very smart can use to their benefit. You use the tools you know how to handle to succeed in life, it is so with everyone.

So to answer the question on how to deal with them, I think you need to learn to spot those manipulative people as soon as you can. They are often opportunistic, trying to ride on the success and hard work of others or directing others to do what they want, while not doing much effort towards it, themselves.
Detect and avoid interacting with them whenever possible.

>>34437998
>How do you deal with them?
By not making them president of the United States.