Definition
A 'watertight' argument or plan is so well-constructed and thorough that it cannot be refuted or undermined; it's flawless. Imagine a submarine designed to withstand immense pressure—it needs to be watertight! 🚢 It suggests a completeness that leaves no room for errors or loopholes. Unlike a flawed argument, a watertight one is sound and irrefutable. It implies a perfect defense against any challenge.