I have been watching a lot of math and games videos on Youtube lately. Presh Talwalkar is a very good presenter. One of his videos, Can You Solve The Dice Rolling Drinking Game? has this statement at the 3:39 mark: “At this state, of course, there’s a certain chance, six out of six chance, that we’re going to roll one of the empty glasses.”
The issue: “certain” can mean 100% probable as in “It is certain that …”, or it can refer to a specific item as in “I was looking for a certain brand of soap.”. In the video, the first meaning is intended.