والثالث: قد تترك الحقيقة بدلالة سياق الكلام
Third, the literal sense may be set aside because of the discourse's context.
The preceding request, the relation between speakers, or the next sentence may establish a meaning that would not be obvious if an utterance were isolated. Thus the interpreter considers how the entire communication fits together.
This especially matters where a form of speech might be used as an order, permission, prayer, request, or conditional statement. The whole utterance may indicate a purpose different from the bare grammatical shape.
Custom is a settled usage across a community; context is evidence within this particular exchange. Both can restrict literal interpretation, but they work through different sources of evidence.