https://pxlnv.com/linklog/siri-invented-calendar-event/
I saw a suggestion from Siri that I turn on Do Not Disturb until the end of an event in my calendar – a reservation at a restaurant from 8:30 until 10:00 this morning. No such matching event was in Fantastical. It was, however, shown in the Calendar app as a Siri Suggestion.