This article presents four experiments investigating the illusory-truth effect, where repetition affects how truthfully statements are perceived. It examines how statements paired with credible sources, whether true or false, influence ratings of truth based on source recollection and statement familiarity. Findings reveal that previously encountered false statements are often rated as truer than new statements due to the unintentional influence of familiarity, even when source recollection is not strong, indicating independent contributions of these two influences on perceived truth.