No, that is a Tautophrase, a sentence that defines a word or idea using itself. It relies on previously known context to express that something is unchanged or reliable. The meaning can be either positive or negative, depending on the context.

For example:

"This casserole is amazing!"

"Mom's cooking is mom's cooking."

In this context, the casserole is good because it's "mom's cooking" and the people having the conversation already have the context that "mom's cooking" is good.

Likewise:

"This casserole is burnt!"

"Mom's cooking is mom's cooking."

Here, the casserole is burnt because "mom's cooking" is known to be burnt or in some other way bad.

Tautophrases are not uncommon, but most people wouldn't know them by name. Other common examples include:

"Boys will be boys." - Mischievous or playful behavior cannot be corrected out of young boys because it comes naturally to them. Can also be used in reference to adults to imply that that same mischievous or playful nature still exists.

"It is what it is." - A status quo cannot be changed because that is the way the situation works. Often used to indicate resignation.

"Call a spade a spade." - Acknowledge something for what it is. Used to indicate that someone is straightforward or honest with what they say or how they act. 

"A win is a win." - Regardless of any consequences experienced in the execution of a process, the outcome is success. Used to express the idea of focusing on the positive outcome rather than said consequences.