DM Bears:
By virtue of being itself it would possess the insight to be able to answer that question, contrary to its creator.
I certainly understand the thrust of that argument and even felt the same way myself, at first brush. The notion of an artificially-created entity desiring or even just proclaiming its own independent self is a constant in fiction. But given the nature of the "Simulacrum" spell, I fall on the side of the Simulacrum not being able to hold opinions or beliefs contrary to what Dzaan does. The spell text states that the Simulacrum is incapable of learning or growing; it's a snapshot of its source. To me, that comes across as the Simulacrum being unable to form its own opinions or behaviors because it is physically incapable of formulating new ideas.
This is, of course, assuming that Dzaan believed as such. For all Mallory knows, the guy had a very liberal view on the standing of created/conjured/summoned creatures as people. He did apparently hang around with an uncontrolled Wight, so Mallory may just be misjudging him because of her own prejudices against the Red Wizards or preconceptions of how magic works because of her education.
DM Bears:
Since it is indestinguishable from a sentient being in the material sense, it would have neurons and synapses that fire and would therefor arguably be capable of thought. So Detect Thoughts should still work.
I disagree on the foundation of that statement, as neurons and synapses and other biological components of a living mind aren't required at all. The spell "Detect Thoughts" specifies that it works on Creatures of INT 4 and up that are capable of language, so that's all that's necessary. Magic fills in the gaps otherwise. For instance, the spell would work perfectly fine on a Ghost or a Flameskull despite those being Undead that have no biology at all. But it wouldn't work on a Mastiff, despite dogs clearly having both the biology and the nature to express thoughts, emotions, and the capacity to learn/reason because their statblock is incompatible with the spell's requirements.
We are back to the sentience quandary though. Regardless of whether or not a Simulacrum qualifies as being sentient, we can at least be certain that it doesn't have a soul. No more so than an Awakened Animal or Shrub would despite having elevated minds. Souls in the Forgotten Realms are entirely separate from a creature's intellect or identity, and to my knowledge souls can't be created by magic. If they could be artificially generated, they wouldn't be such a hot commodity to otherworldly beings.
DM Bears:
The Simulacrum is a construct, and the Monster Manual goes on to say some constructs are imbued with sentience.
I'm not trying to be contrary, but I see this as conflating two entirely different things. A Simulacrum is a construct, but it doesn't use the Construct creature type so it wouldn't behave as such. It's right along with the same wonky game logic of "A Zombie made from a Humanoid isn't a Humanoid" where system qualifiers are concerned. For instance, the spell "Hold Person" normally wouldn't work on any Construct because they're not Humanoids/are immune to Paralysis, but it would work on Dzaan's Simulacrum because it's modeled after Dzaan and thus uses his statblock.
Compare "Simulacrum" to the spells "Create Homunculus" or "Create Magen" which do specifically create Construct creatures. The "Simulacrum" spell has more in common with spells like "Creation", "Mirage Arcane", or "Illusory Dragon" - it's an Illusion that's so potent as to behave like a real thing to all senses.
This is, of course, assuming we're intending to stick close to RAW and you don't just modify the nature of the Simulacrum to actually be a Construct creature type by DM fiat. ^^; That'd be an entirely reasonable thing to do in and of itself, to be perfectly honest, while not being inconsistent with the IC statements or assumptions thus far.
This message was last edited by the player at 11:19, Tue 22 Mar 2022.