In Spanish, 'Es cierto que' is the expression that does not require the subjunctive mood.
Es cierto que is the expression that does not require the subjunctive in Spanish. In this case, the indicative mood is used since there is certainty or factuality in the statement. The other expressions such as Es posible que, Es probable que, and Es increíble que all convey uncertainty or doubt, hence requiring the subjunctive mood.
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