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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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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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Find out how accessible reading music can be. This lesson on how to read tabs will cause you to pick up that old guitar and learn a few new songs. First, you’ll see how the strings are positioned in a tab image and learn to identify fret numbers. Then, learn whether to play notes simultaneously or in a series. Before you know it, you’ll be fluent in guitar tabs.


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Why bend over backwards- or bend over at all- to pick up a tennis ball? Lock and Roll tennis teaches you how to perform Rafael Nadal's sweet trick for getting the tennis ball off the ground using just his feet. It's a stylish, hip, and effortless way to retrieve a ball, especially when you're practicing your tennis swings and have a lot of balls to collect!


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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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What is metaphysics, and what do metaphysicians discuss? How does metaphysics overlap with science? Plato Footnote introduces you to two robots having just this conversation. Join in for the chance to learn about issues of existence and realism, with a focus on questions of time, causation, and general relativity. Note: This lesson is crucial to watch before attempting any time travel, as it explains causal loops.


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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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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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If statements and else statements truly are a match made in heaven. Like black and white, true and false, or 0 and 1 - if and else statements work together so that when one’s conditions are not met, the other steps in to take over. In this straightforward tutorial by Learn to Program, you will learn how to write your own else statements in Python.


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The anatomy of an acoustic guitar and a human body have more similarities than you would think. This lesson shows you how to identify all parts of an acoustic guitar, including the head, the neck, and the body. You’ll understand directional terminology such as “up” the neck and “down” the neck, and explore the basics of electronic extras.


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You've learned how to make page links and anchors that will allow your web browser to travel within and without your website. Now see how to use CSS (Cascade Style Sheets) to determine how your links will appear before and after someone has clicked on them, and when people hover their cursor over the link. Learn To Program teaches you to change color, font size and style, and to underline your links.


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You've tackled Game Theory 101, so what's next? William Spaniel gives you a sneak preview of more advanced Game Theory concepts such as repeated games and incomplete information. What the heck is a Bayesian Nash equilibrium? Who gets a better deal in a negotiation, and why? How and when is war inefficient? Why do people vote? All these questions and more can be answered with the magic—um, science—of game theory!


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Learn how not to write a subgame perfect equilibrium with this lesson from William Spaniel's Game Theory 101 series. Avoid the classic blunders that can trip you up and lose you points on an exam: remember that a subgame perfect equilibrium is a complete and contingent plan of action, and must state what happens on as well as off the equilibrium path of play. This lesson includes a handy trick to check your work by comparing the number of strategies you list with the number of game nodes.


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You should always know how to sort your lists. Luckily, Python provides you with a couple options: the sort method and the sorted function. This tutorial by Learn to Program covers both and explains when to use each. At the end of these last few tutorials, you should be extremely comfortable making and modifying lists in your Python code.


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Find and handle errors and exceptions in your Python code using a few easy statements! The try and catch method of handling errors and exceptions allows you to catch all data that does not apply to a try statement and specify code for it in an except statement. This tutorial by Learn to Program shows you how to write try and except statements that allow you to handle page errors with ease.


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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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Math teachers hear it all the time: “When are we ever going to use this?” Python is just one programming language that uses arithmetic operations, from simple addition and subtraction all the way to floor division and exponents. This tutorial by Learn to Program runs through the basics of Python’s seven operators. Start putting that old math to work!


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Having trouble with the concept of loops, or iterations, in Python? Generally speaking, a loop is a statement that runs through a set of data until its conditions no longer apply. One of the easiest types of loops to understand is the while loop. Watch this tutorial by Learn to Program, and you’ll be programming your own while loops in no time!


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For loops are the most commonly used loops when programming in Python, because they are so powerful. If you know how many conditions you will be utilizing, for loops have a number of features that while loops do not offer. This tutorial by Learn to Program covers when you should use for loops, and demonstrates some of the customizations available to you.


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