The Tiffany Effect refers to the misconception that certain terms or concepts are modern when they actually have much older roots. This effect occurs when people's expectations about the past are based on their own perspective, which can be imperfect. For example, the name "Tiffany" may seem modern, but it originated in the 12th century from the historical name "Theophania". The Tiffany Effect can also manifest in people's perceptions of historical accuracy in popular culture, such as movies or books. It's essential to reevaluate our biases and assumptions about the past, as they may be based on insufficient data.