![]() In other words, if one cannot predict the outcome of a die roll or predict that a given side will turn up with greater probability than any other side, then the die roll is random and we would call it a fair die. However, we can say that the defining characteristic of a random event is its unpredictability. The philosophical question of what exactly "random" is is a topic for a long discussion. Further information is available in our page on random numbers. For example, you can check our randomizer page where we present results from 4 million simulations showing the good performance of the random number generator used in our dice roll generator. Our online software uses a random number generator which passes all tests for cryptographic security and has been demonstrated to generate statistically random numbers. How do we know the dice roller is random? regular octahedron, regular dodecahedron, regular icosahedron, etc. While some of these figures can be irregular, all fair dice are shaped as regular figures, e.g. 20-sided die - an icosahedron (20 faces, d20). ![]()
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