use int if you have a small number of classes,
Proxima Fusion, a Munich-based nuclear energy startup, has outlined plans to raise about €2 billion to build a major fusion test facility in Germany that could be a milestone on the path to commercially viable fusion power. The company expects more than half of that, roughly €1.2 billion, to come from the German federal government, […]
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This formula is satisfiable because if we set to b to true and a to false, then the whole formula is true. All other assignments make the formula false, but it doesn't change that the formula is satisfiable as long as there is at least one assignment makes the formula true.
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