I think they meant that hypothetically, presuming a case where we didn’t have access to better methods. The question might be rephrased as “would this be accura

I think they meant that hypothetically, presuming a case where we didn’t have access to better methods. The question might be rephrased as “would this be accurate and reliable enough to calibrate a thermometer if someone cared to try?”. I might be wrong, but it’s how I interpreted it.