If one were to find themselves in conversation with a modron -- at least a quadrone, probably -- what can one expect them to know?
Although they may appear robotic and programmed, high enough ranks are seemingly able to deal with complex problems and new situations, capable of learning and communicating. Any particular modron's lifespan (even of lower orders) is indeterminate, though its state is static until there is a death in the population, necessitating the reordering and filling of roles. While their operations can be attributed to those of a hive-mind, giving no particular unit individuality of identity, one might surmise their memories survive in some fashion, even in the periodic reshuffling of their population. Do the memories stay a part of that unit as it ascends rank? Does it lose such memories should it find itself back at the bottom? Do the memories survive as a function of whatever rank and role they assume -- sort of like a software update or new access to a racial databank? Is it a doling out of memories and knowledge by Primus, as a locus of modron mind?
In the case of a modron going rogue, it has been the case that along with individuality, they are able to attain and retain their own knowledge and continue to learn. These rogues apparently aren't a part of the collective any longer, so their gains remain with the rogue. There is the suggestion that if that rogue modron should die, the operation of reabsorption and distribution occurs within the base modron population as normal. Assumedly, the knowledge gained by the rogue modron is also taken along with them, but any knowledge that one had of its own individuality or identity seems to be lost, or at least once again dissociated from any specific modron.
The importance of considering the knowledge of a rogue modron illustrates that a modron that hasn't gone rogue has the potential any other being has to know and experience and learn.
While in the collective, is it that any modron knows what it needs to, but is able to call upon the collective's knowledge when faced with a new particular circumstance?
Certainly, those capable of it are able to speak, understands the words being used, perhaps devoid of any personal connection to experience and context. Otherwise, do they merely "not know that they know" until the proper prompt comes their way?
I doubt the average modron has any interest in casual conversation. While they have a duty to order, it seems most would have little curiosity about it outside their purview. No individual modron seems motivated to impose order, but simply obey it.
Whenever one of the collective (not a rogue) has any business outside Mechanus, what would their activity or behavior be like? They might single-mindedly follow a goal, but if there is no conflict in its way or if any deadline is ambiguous enough, what might it do when presented with the opportunity to do anything else?