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The research revolves around the rule of intention, and it was in two axes: the first: defining intention and the basis of its ruling, and the second: the rule of intention in removing impurity, by studying the issues in a comparative jurisprudential study, mentioning the evidence for each statement, then explaining the most correct of the statements, then the conclusion and the most important results, sources and references.
Saeed et al. (Sat,) studied this question.