The relevant aspect of belief here is taking things seriously, so that a coherent picture does get developed around a (disbelieved) premise over time, instead of it getting considered in isolation from time to time and then ignored. Beliefs are either something at a better epistemic tier, or alternatively credence. For the former, exploratory premises (anchors for developing originally-unfamiliar framings) are a bad fit (if you are at risk of not taking it seriously, it’s maybe not a solid fact), while the latter has nothing to do with working inside assumptions (it doesn’t matter how likely your premise it, since to explore it you need to just take it seriously and run with it).
Exploratory premises/framings shouldn’t be about opposition to other premises/framings, or to your beliefs, because they are not about you, not about the other things you believe, they are their own thing. What’s true is that it’s worth picking neglected ideas as seeds for exploration, and opposition to currently held beliefs is a good heuristic for neglectedness. But once accepted as an area of study, the premise/framing is no longer about the opposition that incited it, or else it gets needlessly and unfortunately warped around your pre-existing worldview.
The relevant aspect of belief here is taking things seriously, so that a coherent picture does get developed around a (disbelieved) premise over time, instead of it getting considered in isolation from time to time and then ignored. Beliefs are either something at a better epistemic tier, or alternatively credence. For the former, exploratory premises (anchors for developing originally-unfamiliar framings) are a bad fit (if you are at risk of not taking it seriously, it’s maybe not a solid fact), while the latter has nothing to do with working inside assumptions (it doesn’t matter how likely your premise it, since to explore it you need to just take it seriously and run with it).
Exploratory premises/framings shouldn’t be about opposition to other premises/framings, or to your beliefs, because they are not about you, not about the other things you believe, they are their own thing. What’s true is that it’s worth picking neglected ideas as seeds for exploration, and opposition to currently held beliefs is a good heuristic for neglectedness. But once accepted as an area of study, the premise/framing is no longer about the opposition that incited it, or else it gets needlessly and unfortunately warped around your pre-existing worldview.