Linked from
The 20 pages that link to Replication, each with the reason it gives.
ParapsychologyRelated: Repeated, independent results are a central test of claimed psychic effects.
HypothesisRelated: Repeated results test whether support for a hypothesis depends on one study.
MemeticsRelated: Memes must be copied, with or without exact fidelity, to spread.
Experimental methodRelated: Repeated tests show whether an observed result is dependable.
MythBustersRelated: Repeating tests could expose inconsistent outcomes and strengthen a verdict.