  Recently, Locate-Then-Edit paradigm has emerged as one of the main approaches
in changing factual knowledge stored in the Language models. However, there is
a lack of research on whether present locating methods can pinpoint the exact
parameters embedding the desired knowledge. Moreover, although many researchers
have questioned the validity of locality hypothesis of factual knowledge, no
method is provided to test the a hypothesis for more in-depth discussion and
research. Therefore, we introduce KLoB, a benchmark examining three essential
properties that a reliable knowledge locating method should satisfy. KLoB can
serve as a benchmark for evaluating existing locating methods in language
models, and can contributes a method to reassessing the validity of locality
hypothesis of factual knowledge. Our is publicly available at
\url{https://github.com/juyiming/KLoB}.
