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| [[Preliminary Discussion on Models]] | [[Preliminary Discussion on Models]] | ||
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| - | Difficulty in checking $\models S$: there are infinitely many models, of arbitrarily large cardinalities. | ||
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| - | Goal: show that if a set $S$ of formulas has a model, then it has a model of particular sort. Then it suffices to look into those models. | ||
| [[Ground Terms]] | [[Ground Terms]] | ||