I want to know the answer to the following question:
Attempting to use Gregorian dates for earlier events  on the Julian calendar should be used with what action?
All the background I'm provided with is that "For ordinary purposes, the dates of events occurring prior to 15 October 1582 are generally shown as they appeared in the Julian calendar, with the year starting on 1 January, and no conversion to their Gregorian equivalents.". Is that enough to answer the question?