On Sameness and Identity: A Psychological Study Being a Contribution to the Foundations of a Theory of Knowledge

"On Sameness and Identity: A Psychological Study" by George Stuart Fullerton is a scholarly work from the late 1800s that looks closely at the ideas of sameness and identity within our minds. The book highlights how the word "same" can be confusing, leading us to think different things are actually identical. Fullerton wants to make these differences clearer, showing how misunderstandings can affect what we know and how we see the world. The book starts by talking about all the different meanings we give to the word "same." Fullerton sorts these meanings into groups, from what it feels like to sense something right now to how we see the same thing over time. By taking this organized approach, Fullerton hopes to make sense of how we understand identity in what we see and think, opening the door for bigger questions about how we build our knowledge.