This text examines the concept of scientificity and its grounding within specific disciplines and philosophy. The author argues that the definition of scientificity cannot legitimately fall under the competence of specialized sciences themselves, as this would lead to a circular justification where a field declares its own methods correct. In practice, scientificity is often substituted by field-specific conventions, which, while allowing for internal debate, are vulnerable to prevailing prejudices. Since scientificity cannot be established "scientifically" for logical and principled reasons, this foundational role must be assigned to another discipline. Historically and theoretically, this discipline is philosophy. Philosophy is characterized here as a pre-scientific endeavor that is not anti-scientific, but rather served as the "general science" from which specific disciplines emerged. The abstract concludes that philosophy remains the essential guarantor of scientificity, providing the necessary theoretical framework that specialized sciences cannot provide for themselves.