FACT.  You could make an argument that it is Fiction, but it's Fact because the member formula examples are GetDataCell() calls that do dynamic math to present a result in a report, it does not store the result in the database like a calculation does, however.  I'd say Fact for this, because but I could understand the Fiction answer, as someone may interpret a Calculation to be intended to store the result in the DB (api.data.Calculate()).  One could make a sound argument for either Fact or Fiction on this one.  Interested to see other responses to the thread.