A slip up is a mistake in game coding or an accidental omission or inclusion of incongruous factors.
A slip up is not in any way similar to an Easter egg, as eggs are added intentionally.
So, Slip Ups or not? You decide.
Don’t know how intentional these may be.
After Colin has fled the Ca, you can still access his treasured microscope by clicking on the hotspot.
But this may have been left to be helpful for reviewing the messages.
Also, you cannot check of the last task on your list
“Find a way to keep myself from drowning ( translating that sign into english might help)!”
even after you obviously did both of those things.
In the Book of Chinese Symbols, the symbol for fire is printed twice.