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During the World wars, there were certainties about where Germany would expand to and conquer, but there was doubt on what type of methods they were using and how it would affect the rest of Europe.

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Dick was entirely certain about his plan to rob the Clutters. He kept repeating that it was the perfect score. Phelps states that if you absolutely believe in something, then you can achieve anything. This isn't true because despite the fact that Dick was entirely certain that his plan would work, it didn't.

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The placebo effect, often observed in medical trials, is the effect in which the body can physically alter itself when it believes that its being helped. For instance, if somebody is given fake medicine, but they believe that the medicine is real, their body will act as though it's being medicated and heal itself.

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The certainty that you can achieve it keeps you motivated and confident, but the doubt keeps you realistic and grounded

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Monks that devote their life to their religion because they are certain in their beliefs

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Monks that devote their life to their religion because they are certain in their beliefs

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Over 8 million died in Europe due to a war fought between protestants and Catholics. This blind following of ideology needlessly caused the death of millions.

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Alan Turing had doubts that he would be able to decipher the Enigma during WW2, however he was certain in what his purpose was and what his goal was. Our founding fathers had doubts when trying to accomplish making a nation that they envisioned. They were certain, however, in what they wanted to to accomplish and what they wanted in this country they were striving to create.

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Hitler/Stalin/Mussolini/Jihadists/ Suicide bombers
Their followers blindly believed them and the leaders convince themselves of their own truth. This can lead to real consequences.

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George Washington was doubtful when he was first elected president. He wasn't sure if he was competent enough to do the job. He had a hard time accepting.  After he agreed and was certain that this position was right for him, he was able to help America.

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George Washington was doubtful when he was first elected president. He wasn't sure if he was competent enough to do the job. He had a hard time accepting.  After he agreed and was certain that this position was right for him, he was able to help America.

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You need to have certainty as a driving force to be religious, but the doubt that goes along with religion makes our faith stronger as we work through it

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Holden was doubtful in his own ability to grow up. This led him to stay grounded and continually reflect on what his life should look like before he becomes fully independent.

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You need motivation confidence in your own abilities in order to be successful (fake it til you make it).

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Kids that are born into a religion and believe wholeheartedly in them sometimes suffer crises of faith. This can be devastating as they center their whole lives around something that they end up losing. When they lose that, they lose everything.

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My dance teacher Greg Begley went to school certain that he wanted to be a dancer, but doubtful that he would stay as a dancer for his entire life. He decided to go to school double majoring in dance and business. His certainty led him to be successful as a dancer, but upon getting married and having kids, decided to go into a business field opening a dance store to provide for his family. His level of doubt when he was young allowed him to adjust to his lifestyle later in life.

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There must be a balance between certainty and doubt and the strongest beliefs are ones that have been tested by doubt.

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Atom model, Darwinism, The enlightenment

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Atom model, Darwinism, The enlightenment

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Without questioning anything, there can be no progress. Ideas often improve on one another to reach newer, better conclusions. If doubt is never a question, improvement will never be a question.

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Suicide Bombers (Muslim Extremists) Can also relate to Puritans believing themselves superior.

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Suicide Bombers (Muslim Extremists) Can also relate to Puritans believing themselves superior.

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It you have too much confidence you will get into a competitive school and you don get in, you will have no where to attend. In applying to a safety school, you exhibit doubt but in a way that allows you to be cautious with your future.

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Certainty and doubt work hand-in-hand, balancing each other out so that a person can achieve success in a cautious way.

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Without doubt, people tend to follow blindly, which can have devastating consequences. In addition, doubt is the only thing that can push progress.

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Jesus asked Peter to come out of the boat and walk on the water with him. Peter was certain and trusted in Jesus and successfully walked on water. But shortly after, he started doubting, and that was when he started sinking.

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A person should be certain in the goals they'll achieve, but have doubt in the methods that they use to accomplish those goals.

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The relationship between certainty and doubt is non existent because certainty is linked to decisive action where as doubt is a fear that disables one from accomplishing their goals.