There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option 1, 2, 3, or 4) the following sentence would best fit.
Paragraph: ___ (1) ___ An argument can be defined as a complex symbolic structure where some parts, known as the premises, offer support to another part, the conclusion. Alternatively, an argument can be viewed as a complex speech act consisting of one or more acts of premising (which assert propositions in favor of the conclusion), an act of concluding, and a stated or implicit marker ("hence", "therefore) that indicates that the conclusion follows from the premises ___ (2) ___ . The relation of support between premises and conclusion can be cashed out in different ways: the premises may guarantee the truth of the conclusion, or make Its truth more probable; the premises may imply the conclusion; the premises may make the conclusion more acceptable (or assertible) ___ (3) ___ . But depending on one's explanatory goals, there is also much to be gained from considering arguments as they in fact occur in human communicative practices ___ (4) ___ .
Sentence: For theoretical purposes, arguments may be considered as freestanding entities, abstracted from their contexts of use in actual human activities.
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