I don't know, but due to the absurd way their session works, I'd say one has to predominate over the other before they start playing it.
Actually, this reminds me of a conversation I had with 2257 about the subject once. Our conclusion was that homestuck itself was the reason that Calliope lost her predomination struggle with her brother.
Calliope has been exposed to the events of the human and troll sessions through the writings of Rose and contact with her human friends. This gave her an understanding of the culture of social species. Fascinated by this, she assimilated alien concepts such as compassion, pleasantness, and collaboration into her behavior, which ultimately weakened her position in the struggle and allowed Caliborn to take advantage of her. So essentially, her love of homestuck doomed her.
The version of Calliope that predominated says she has been lonely forever, and alpha Calliope theorizes that she never had human friends. So that Calliope probably never read Homestuck, never understood compassion, and never gave her brother a chance to take advantage. This supports the theory that reading or not reading Homestuck is the deciding factor in whether Calliope dominates or is dominated.
We then theorized that, in a shitty twist, it was Caliborn himself that arranged for Calliope to learn about Homestuck. To make sure she is weakened and to ensure his existence as the one who predominated. Caliborn acts through his agents, so if this theory is true, we can assume that it was probably Gamzee who brought Rose's writings, and everything else, to the young cherubs when they hatched.
But through John's changes, Gamzee presumably has been disabled as an agent, meaning he never brings Homestuck to Calliope, she never understands alien customs, and she turns into the version of Calliope that Jade saw. Meaning that it would explicitly be John's retcons that allowed Calliope to predominate instead of her brother. Which in a roundabout way would constitute as John using the powers of the retconny house as a weapon against Caliborn, by creating the one person that is an even match for him.
This is very silly.
Actually, this reminds me of a conversation I had with 2257 about the subject once. Our conclusion was that homestuck itself was the reason that Calliope lost her predomination struggle with her brother.
Calliope has been exposed to the events of the human and troll sessions through the writings of Rose and contact with her human friends. This gave her an understanding of the culture of social species. Fascinated by this, she assimilated alien concepts such as compassion, pleasantness, and collaboration into her behavior, which ultimately weakened her position in the struggle and allowed Caliborn to take advantage of her. So essentially, her love of homestuck doomed her.
The version of Calliope that predominated says she has been lonely forever, and alpha Calliope theorizes that she never had human friends. So that Calliope probably never read Homestuck, never understood compassion, and never gave her brother a chance to take advantage. This supports the theory that reading or not reading Homestuck is the deciding factor in whether Calliope dominates or is dominated.
We then theorized that, in a shitty twist, it was Caliborn himself that arranged for Calliope to learn about Homestuck. To make sure she is weakened and to ensure his existence as the one who predominated. Caliborn acts through his agents, so if this theory is true, we can assume that it was probably Gamzee who brought Rose's writings, and everything else, to the young cherubs when they hatched.
But through John's changes, Gamzee presumably has been disabled as an agent, meaning he never brings Homestuck to Calliope, she never understands alien customs, and she turns into the version of Calliope that Jade saw. Meaning that it would explicitly be John's retcons that allowed Calliope to predominate instead of her brother. Which in a roundabout way would constitute as John using the powers of the retconny house as a weapon against Caliborn, by creating the one person that is an even match for him.
This is very silly.