Actually it is not splitting hairs, because there are policies in place for students with long term absences, and students with Disabilities who may be absent due to chronic illnesses. This is why I recommended that op look at the teachers Syllabi and grading policy. It is also a conversation that parent and student also need to have at the beginning of the term as to which how absences will be handled and being proactive before grades are in jeopardy vs waiting until days before the term ends.