valid

Imagine building with LEGOs. If your instructions are valid, they make sense and will actually help you build the cool spaceship pictured on the box. A valid argument is logically sound, a valid passport allows you to travel, and a valid driver's license lets you legally drive. Something is valid if it holds up when checked closely. It is well-founded and acceptable. You might say a scientist's findings are "valid" after they have been carefully tested and confirmed. The word often suggests correctness within a specific system or context.

The word valid describes something that is sound, legitimate, or justifiable. It means conforming to accepted rules or standards; it holds up when examined. Think of it as being "correct" in a particular framework – not necessarily universally true, but true within the given system.

You'll often encounter "valid" when discussing arguments or reasoning. A valid argument isn't necessarily true, but its structure is logically sound; if the premises are true, then the conclusion must also be true. For example: "All cats are mammals. Mittens is a cat. Therefore, Mittens is a mammal." That's a valid (and true!) argument.

But "valid" extends beyond logic. A valid passport or driver's license means it hasn't expired and meets the requirements for identification. A valid contract is legally binding because it fulfills all necessary conditions. A doctor might confirm that your test results are valid, meaning they accurately reflect your health status.

Sometimes, "valid" is used to acknowledge someone's feelings or experiences. Saying "Your concerns are valid" means you recognize and respect their perspective, even if you don't necessarily agree with it. It shows empathy and understanding.

So whether assessing logic, confirming legality, or acknowledging emotions, valid signifies something that is well-founded, justifiable, and acceptable within a specific context – something that "checks out."