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Make your webpage interactive by designing user events that call functions! In this third of three lessons on functions from Learn to Program's JavaScript series, discover how you can create a page that will respond to certain events or actions. See how to make a button page visitors can click, set up functions to execute once the page has loaded, and have the page respond to a user hovering the mouse over a button or word.


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Learning how to pick guitar chords resembles raking leaves: easy does it. Follow along with Your Guitar Sage and discover how to produce an open, whole sound with these basic chord techniques. This lesson covers where to place your fingers, how to arpeggiate in order to hear muted notes, and how to adjust your fingers to obtain a full chord sound.


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Don’t think you’re cut out for playing guitar? Think again! Everyone gets frustrated. Even Jimi Hendrix wasn’t a rock god from day one. Check out this lesson for advice on learning how to play guitar and the encouragement to keep doing it. You’ll surely want to continue pickin’ after hearing these words of wisdom. Practice and persist!


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Are you interested in playing guitar? Check out this lesson for advice on posture and picking techniques. First, you’ll learn the details of folk posture and classical posture; both have their own advantages. Next, find out how to properly hold a pick. Before you know it, you’ll be picking comfortably all the time.


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War: what is it good for? Find out using backward induction to solve the Escalation Game, courtesy of William Spaniel's Game Theory 101 lesson. Should State 1 accept the status quo, or threaten State 2? If threatened, should State 2 concede, or escalate to war? Learn how each state can work backward to determine its opponent's optimal strategies, figure out its maximum payoff at each decision point, and discover why peace really is the answer.


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A recent book written by Sam Harris called The Moral Landscape argues that science can answer moral questions, and has caused quite a bit of discussion on the matter. Enter into this dialogue, and discover what both sides of the debate have to say. In this lesson from Plato Footnote, learn what makes a fact, fact, and what contributions science can make in the field of ethics (for example). Finally, this lesson concludes with a short exploration of moral relativism, Plato, and the divine.


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The clothes may not maketh the man, but it's the cycle jersey that maketh the cycling champion! Art's Cyclery walks you through the three aspects to consider when selecting a cycling jersey: fabric, construction, and additional features. Learn about the importance of moisture wicking, the differences between a race cut and semi-fitted jersey, and get a list of some key additional features a more expensive jersey will include.


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Learn when and why to burn your bridges (i.e., limit your own options) in this lesson on creating credible threats in subgame equilibrium game theory. When two countries on opposites sides of a river are seeking control over an island - why should the first country invade the island, burn the bridge leading home, and cut off its route of retreat? Follow along with William Spaniel as he uses the Burning Bridge game theory scenario to illustrate the use of backward induction and credible threats.


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Discover the Centipede Game, a game theory conundrum where the inability of players to credibly commit prevents a high payoff ... in theory. But in practice, players defy predictions and continue playing the game for several rounds—leading to an ever higher payoff. Follow along with William Spaniel's Game Theory 101 lesson as he explains the theory, assumptions, and practice behind the commitment problems in this puzzling scenario.


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Are you a seasoned guitarist always on the lookout for advice? Or maybe you’re a frustrated beginner? Here’s a small tip that will last a lifetime of guitar playing: curl the last knuckle of each fretting finger. This helps you to strum chords efficiently and hit every necessary note. Check out this lesson to fully comprehend the importance of the curl.


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This lesson will teach the budding painter how to add dimension to an acrylic painting of the ocean by using the wet-on-wet technique. By layering and blending colors of wet paint, artists can create a realistic painting of ocean waves crashing, complete with variations in tone and color. This lesson teaches how to mix paint to achieve a richer picture, as well as how to add reflection to water and give sea foam the illusion of volume by using highlights and shadows.


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Why wear boring old flip flops when you could customize them to your own style? Sophie's World teaches you how to decorate flip flops with felt, markers, fleece, or bling - such as beads, rhinestones, and sequins. This is a great craft for kids or adults, and when you're finished you'll have a new glamorous or extra cozy pair of homemade sandals!


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Are you learning how to play guitar? Interested in the mechanics of how to make a low-pitched noise versus a high-pitched noise? This lesson examines the basic physics of sound, from pitch range to volume control. Check out this lesson and discover how to create the sound you want - including how to adjust the volume of your guitar without a control knob!


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Do you think your fingers lack the dexterity needed in order to play guitar? Never fear! This lesson shows you one of the most basic dexterity exercises that every beginning guitarist should practice. You’ll learn where to press down on the frets, how to pick and change frets, how to change strings, and how to move your fingers up the fretboard. It’s simple and you can go at your own pace.


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Elif statements allow you to stretch your data comparisons into infinity! Sandwiched between if and else statements, elifs allow you to check for multiple conditions, provided that the if statement’s condition is not met. Once you have mastered if, else and elif statements with this tutorial by Learn to Program, you will be on your way to making useful, flexible Python code.


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Life's full of tough choices, and sometimes there's not just one right answer: there are infinitely many. In this Game Theory 101 lesson by William Spaniel, learn about scenarios in which a set of mixed strategies can lead to an infinite number of Nash equilibria. Review concepts like strict dominance, pure strategy Nash equilibria, and partially mixed strategies - and discover how one player's pure strategy can result in another player's indifference.


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Want to make a fun and colorful alcoholic drink? In this lesson, The Vegetarian Baker teaches you how to infuse Absolut Vodka with jelly beans, making the vodka colorful and sweet. Using mini vodka bottles and jelly beans, you can create a cheerful mini-fridge-sized drink with a kick. It's the perfect way to get a little of your inner child into your adult beverage!


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You may have called it a miracle when your best friend who’d previously flunked every algebra test received an “A” on the final, but according to philosopher David Hume, what you actually witnessed was an “unusual occurrence.” In this lesson from Plato Footnote, learn what distinguishes an “unusual occurrence” from a miracle, what qualifies as a miracle, and what accounts for the lack of miracles in our modern times. Finally, discover Hume’s opinion on both ancient and modern religions.


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Do we have free will, or do we just boil down to particles following the laws of physics? Professor Massimo Pigliucci from Plato Footnote leads us into a world where science and philosophy collide by discussing the concept of reductionism. This lesson also includes an explanation of the difference between ontological and epistemological reductionism, and how these debates come to bear on ideas of emergent properties, morality, and free will.


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