Fat_alError:

This term describes a phenomenon of meme proliferation occurring between AUs; it causes the self-dissolution of Aftertale, thereby preventing the birth of Error!Sans.

The mechanism is as follows: after the Sans who absorbed Determination is defeated—but before the events of Aftertale actually begin—he becomes addicted to the injected Determination itself. He ceases to care about timeline issues, transforming from the so-called "Geno Sans" into "Gluttony Sans," and proceeds to exhaust the alternate universe's total supply of Determination through various means.

Ultimately, stripped of its Determination, the alternate universe loses the impetus for further development and self-destructs before it can even become Aftertale, thus eliminating the possibility of the subsequent transformation process.

Out!Laws:

A set of exile protocols established by a group of Jerrys who, having been banished from their original AU, drifted through outer space. They systematically fled into various "Inktale-like" AUs—unfinished projects that never progressed beyond the conceptual stage and only had partial character designs—to live lives of seclusion.

This provided characters who questioned the nature of their world with someone to talk to; consequently, they avoided succumbing to the nihilism that would otherwise shatter their souls and prevent the birth of Ink!Sans.

Among them, Lord Jerry is regarded as a thought leader by the other Jerrys for offering highly valuable insights; it is even rumored that he has negotiated with certain Ink!Sans variants and secured temporary residency rights within some of these abandoned AUs.