For most major diseases, including most age-associated diseases, causes are often difficult to precisely define and treat.

Protocol specifications precisely define the interfaces between different computers, but the software interfaces inside computers, known as network sockets are implementation-specific.

Some additional definitions were added to more precisely define the terms with less ambiguity.

On the contrary, it makes people emit carbon dioxide, acetone and isoprene in a precisely defined ratio.

First, can the concept be precisely defined?