Your hypothetical rule change would by no means matter, as a result of there may be presently no manner for a participant to win and lose the sport concurrently and subsequently it’s unattainable for 104.3f to use.

Generally, the steps of an impact in Magic are adopted within the order they’re written, usually APNAP order. An impact stating “you lose the sport and also you win the sport” would trigger you to lose the sport strictly first, earlier than the “you win the sport” impact might apply.

There are two exceptions to this generalization: injury occasions (510.2) and state-based actions (704.3). Replacement results can change solely elements of those occasions, so theoretically by filtering by a number of alternative results we might change one a part of the occasion to “you lose the sport” and one other half to “you win the sport”.

Unfortunately, the one strategy to win the sport with alternative results is thru Laboratory Maniac or Jace, Wielder of Mysteries. Both of those require us to attract a card through a alternative impact, and a really particular rule will get in our manner:

121.7. Some alternative results and prevention results end in a number of card attracts. In such a case, if there are any elements of the unique occasion that haven’t been changed, these elements happen first, then the cardboard attracts occur separately.

Consider the next scenario. A participant who has an empty library and graveyard controls:

Their opponent assaults with a 2/2 creature with trample, they usually block with their 1/1. The injury occasion begins out as

(1 injury dealt to the 1/1 AND SIMULTANEOUSLY 1 injury is dealt to the two/2 AND SIMULTANEOUSLY 1 injury is dealt to the participant AND SIMULTANEOUSLY the participant positive factors 1 life)

The former two are irrelevant for our functions. Nefarious Lich’s alternative results change the latter two occasions to

(the participant exiles 1 card from their graveyard, if they can not they lose the sport AND SIMULTANEOUSLY the participant attracts 1 card)

If you did not learn about 121.7, you may assume that Laboratory Maniac replaces the draw right here leading to a simultaneous win and loss. But what truly occurs is that 121.7 notices a alternative impact leading to a card draw and ends in

(the participant loses the sport.) then,
(the participant attracts 1 card.)

So the participant merely loses.

If you are notably astute, you may seize upon 121.7’s wording “the unique occasion” and suppose that it will not apply if we utterly changed each a part of the beginning impact. However, I’ve personally consulted with a decide I do know. He says that the consensus within the judging group is that “unique” on this context refers to not the impact that was initially generated earlier than alternative results began to use, however to the impact after the alternative impact that ends in card attracts. In different phrases, it doesn’t imply “if each a part of the impact that was generated has been overwritten by alternative results”, however as a substitute means “if any a part of the impact that has now been partially changed with card attracts consists of one thing aside from card attracts”.