The answer is False.
An @media/@import rule contains a malformed media type (not an identifier) then the statement is invalid.
A media type is a string that describes the capabilities of a device or user agent. It is used to specify which CSS rules should be applied to a document, depending on the device or user agent that is viewing it.
A valid media type is a string that follows the syntax defined in the CSS specification. A malformed media type is a string that does not follow the syntax defined in the CSS specification.
For example, the following media type is valid:
screen and (min-width: 600px)
This media type specifies that the CSS rules should be applied to all devices that have a screen and a minimum width of 600 pixels.
The following media type is malformed:
screen and (min-width: 600px
This media type is malformed because it does not have a closing parenthesis.
If an @media/@import rule contains a malformed media type, then the statement is invalid. The CSS parser will not be able to parse the media type and will not be able to apply the CSS rules to the document.