The answer is not to expand Lies My Teacher Told Me to cover every distortion and error in history as traditionally taught, to say nothing of the future lies yet to be developed. That approach would make me the arbitrator - I who surely still unknowingly accept all manner of hoary legends as historical fact. Instead, the answer is for all of us to become, in Postman and Weingartner's vulgar term, 'crap detectors' - independent learners who can sift through arguments and evidence and make reasoned judgements. Then we will have learned how to learn, as Postman and Weingartner put it, and neither a one-sided textbook nor a one-sided critique of textbooks will be able to confuse us.
A person whom ignores learning and gathering of wisdom from the world’s great thinkers runs the risk of never escaping a dark canister housing his or her personal ignorance.
For example, many students will begin an improvisation, or a scene, in a rather feeble way. It's as if they're ill, and lacking in vitality. They've learned to play for sympathy. However easy the problem, they'll use the same old trick of looking inadequate. This ploy is supposed to make the onlookers have sympathy with them if they 'fail' and it's expected to bring greater rewards if they 'win'. Actually this down-in-the-mouth attitude almost guarantees failure, and makes everyone fed up with them. No one has sympathy with an adult who takes such an attitude, but when they were children it probably worked. As adults they're still doing it. Once they've laughed at themselves and understood how unproductive such an attitude is, students who look 'ill' suddenly look 'healthy'. The attitude of the group may instantly change.