Is not new synonym

A great question!

While "is not new" and "is old" are related concepts, they are not exact synonyms. Here's why:

• "Is not new" implies that something exists, but it's not recent or has been around for a while. It doesn't necessarily imply that it's old or outdated.
• "Is old" implies that something has been around for a significant amount of time, often with a connotation of being outdated, worn out, or no longer relevant.

To illustrate the difference:

• "This book is not new" might mean that the book was published recently, but it's not a new release.
• "This book is old" might mean that the book was published decades ago and is no longer widely read or relevant.

That being said, in some contexts, "is not new" might be used as a euphemism for "is old" or "is outdated". For example:

• "The company's business model is not new" might imply that the model is old and no longer innovative.
• "The technology is not new" might imply that it's outdated or no longer state-of-the-art.

In summary, while "is not new" and "is old" are related concepts, they are not exact synonyms. "Is not new" implies something exists but is not recent, while "is old" implies something has been around for a significant amount of time and may be outdated.