She currently believes they are fictional but will be very careful if she encounters one
However an inkstone witch like inkmatas wouldn't be considered as much of a threat because they are not known as well for curses as they are for actual attacks. Because of this they are less of a threat due to data's extreme agility
Interesting, Also it's been discovered that there's a new phase of Inkstone magic, this phase is believed to be a faster phase then her Infernium phase