This is a classic example of the person who will never be a good software tester.

Software Defect. The difference between the functional specification (including user documentation) and actual program text (source code and data). Often reported as problem and stored in defect-tracking and problem-management system

Software Defect. Also called a fault or a bug, a defect is an incorrect part of code that is caused by an error. An error of commission causes a defect of wrong or extra code. An error of omission results in a defect of missing code. A defect may cause one or more failures.[Robert M. Poston, 1996.]

Software Defect. A flaw in the software with potential to cause a failure.. [Systematic Software Testing by Rick D. Craig and Stefan P. Jaskiel 2002]

Software Defect Age. A measurement that describes the period of time from the introduction of a defect until its discovery. . [Systematic Software Testing by Rick D. Craig and Stefan P. Jaskiel 2002]

Requirements (IEEE)b> (1) A condition or capability needed by a user to solve a problem or achieve an objective (2) A condition or capability that must be met or possessed by a system or system component to satisfy a contract, standard. specification, or other formally imposed documents. (3) A documented representation of a condition or capability as in (1) or (2). See: design requirement, functional requirement, implementation requirement, interface requirement, performance requirement, physical requirement.