Statement: 'Smoking is injurious to health' - A mandatory warning printed on cigarette packets.
Assumptions:
I. People read printed matter on a cigarette packet.
II. People take careful note of a warning.
III. Non-smoking promotes health.

* Assumption I is implicit: A warning notice is printed on a commercial packet with the core expectation that consumers look at and read the contents printed on the packaging.
* Assumption II is implicit: The fundamental purpose of issuing any official warning notice is that people notice it and modify their behavior accordingly.
* Assumption III is not implicit: The statement mentions that smoking harms health; however, it does not mean that non-smoking automatically guarantees or enhances general fitness beyond baseline conditions.

Hence, only assumptions I and II are implicit.