Lies society teaches us.

You can choose your gender....
everyone is a winner (trophy's for losing even)
Political correctness is mandatory (when it's really just a form of lying)
Wealth redistribution/socialism....everyone get's their fair share when the it's just robbing from productive people to help unproductive people (meaning those who are able and won't work)
Satanism is good/okay via mainstream cartoons, sitcoms, dramas etc....
There is no black/white on issues only gray areas /relative truth to each person
New medications/diseases that are made up on the fly and have no scientific background behind them....
Entertainers/Sports figures are to be held up as gods/role models when they are the very degenerates youth should be avoiding.
You're not cool if you don't use facebook/twitter ( I guess I'm not cool then muhuahahhaha like I care )
You're not cool if you don't have the latest blank....(thing, car, phone, clothing etc)
Consumerism/materialism is what you need....never be satisfied with what you have....
Global warming is a crisis and human are the problem (the underlying agenda is depopulation by way of saving mother earth/gaia)
Vaccinations are good for you,...when in reality they are not and most don't provide any benefit but create other diseases to feed the pharmaceutical company beasts their profits.
Common core education is good for every student/no child left behind..(2+2 = 5)..complete bs and dumb's down the curriculum so the how do I put it "dumb/academically challenged" kids can pass the test while the academically gifted/studious are held back by poor curriculum...this is especially true for inner-city children in chicago, LA, etc who are neglected from improving their education standards.
Politicians care about the common man....another complete bs they don't give a damn about you except their corporate lobbyists.
Terrorism is a threat....most govt's commit the crimes to further enslave/restrict the people....
Paper money is worth something....all currency is worthless except hard metals.
The stock market is legit and you can work your way up wall street/start a small business.....another hoax as most corporate profits/CEO's get there by hook and crook...stepping on people and committing illegal acts that the common man would go to jail for but they don't.

My epistle is pretty thorough I think, if you enjoyed reading it give me a like/rep points!

Scottish paper money (and I think English too?) says that the bank promises to pay the carrier of it in coins, or something of that effect.

Norway recently got rid of our 50 øre (half a crown) because the metal was worth more than the value of the coin

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A lie:
You must to go the university / university college to get a job.
(If I'd chosen to ignore that advice/ claim, I wouldn't be hunting jobs now)

Excellent response, Ultimatum77. Very broad thorough, but I'm sure there is more, and I hope others will post things no one has mentioned. The lies are so common and insidious. Thank God we have the absolute truth of the Word of God to renovate our thinking.

Here is one I just remembered.

Passing more laws can correct all the evils in society.

Whenever some tragedy happens the politicians rush to a microphone and say, "We will pass a new law to prevent this from ever happening again." But of course it continues to happen, sometimes more secretly, because the sin nature still exists.