Final answer:
The statement suggesting all defects can be removed from a program through thorough testing is false. Software complexity and interactions mean some issues may only be discovered after release. Thorough testing improves quality but cannot guarantee perfection.
Step-by-step explanation:
The statement 'With thorough testing it is possible to remove all defects from a program prior to delivery to the customer' is false. In the field of software development, it is virtually impossible to ensure that a program is completely free of defects before it is delivered. Thorough testing can indeed identify and remedy many defects, but due to the complexity of software systems and the interactions between various components, it's likely that some defects will remain undiscovered until after the software is in use.
A counter example to thorough testing guaranteeing a defect-free product can be seen in the automotive industry. In one such case, a manufacturer knew of defects in the brake systems of one of their vehicle models. Despite testing which indicated serious issues likely to cause brake failure, they continued with production. The result was numerous brake failures leading to injuries and deaths, for which the manufacturer was held liable. This example illustrates that poor design decisions and ignoring known defects can lead to catastrophic consequences and that complete certainty in defect elimination is unachievable.
In summary, while thorough testing is fundamental in quality assurance for software and other engineered products, it is not a guarantee of perfection. Developers and manufacturers must be diligent in design and testing, while also being prepared to manage the defects that may only come to light after a product is released.