And that's not even getting into the math underlying the dath ilani concepts of 'fairness', like, if Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of fairness, that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it.

And that's not even getting into the math underlying the dath ilani concepts of 'fairness'!  If Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of 'fairness', that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it, such that the problem of arriving at negotiated prices is locally incentivized to become the problem of finding a symmetrical Schelling point.

And that's not even getting into the math underlying the dath ilani concepts of 'fairness'!  If Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of 'fairness', that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it, such that the problem of arriving at negotiated prices is locally incentivized to become the problem of finding a symmetrical Schelling point.

You wouldn't think you'd be able to build a civilization without having invented the basic math for things like that, the way that coordination actually works at all in real-world interactions as complicated as figuring out how many apples to trade for an orange; and in fact, having been tossed into Golarion or similar places, one rapidly realizes that people do not in fact successfully build civilizations that are remotely sane or good if they haven't grasped the Law governing the basic multiagent structures like that.

And that's not even getting into the math underlying the dath ilani concepts of 'fairness'!  If Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of 'fairness', that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it, such that the problem of arriving at negotiated prices is locally incentivized to become the problem of finding a symmetrical Schelling point.

You wouldn't think you'd be able to build a civilization without having invented the basic math for things like that, the way that coordination actually works at all in real-world interactions as complicated as figuring out how many apples to trade for an orange; and in fact, having been tossed into Golarion or similar places, one rapidly realizes that people do not in fact successfully build civilizations that are remotely sane or good if they haven't grasped the Law governing basic multiagent structures like that.

And that's not even getting into the math underlying the dath ilani concepts of 'fairness'!  If Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of 'fairness', that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it, such that the problem of arriving at negotiated prices is locally incentivized to become the problem of finding a symmetrical Schelling point.

(You wouldn't think you'd be able to build a civilization without having invented the basic math for things like that - the way that coordination actually works at all in real-world interactions as complicated as figuring out how many apples to trade for an orange.  And in fact, having been tossed into Golarion or similar places, one sooner or later observes that people do not in fact successfully build civilizations that are remotely sane or good if they haven't grasped the Law governing basic multiagent structures like that.)

And that's not even getting into the math underlying the dath ilani concepts of 'fairness'!  If Alis and Bohob both do an equal amount of labor to gain a previously unclaimed resource worth 10 value-units, and Alis has to propose a division of the resource, and Bohob can either accept that division or say they both get nothing, and Alis proposes that Alis get 6 units and Bohob get 4 units, Bohob should accept this proposal with probability < 5/6 so Alis's expected gain from this unfair policy is less than her gain from proposing the fair division of 5 units apiece.  Conversely, if Bohob makes a habit of rejecting proposals less than '6 value-units for Bohob' with probability proportional to how much less Bohob gets than 6, like Bohob thinks the 'fair' division is 6, Alis should ignore this and propose 5, so as not to give Bohob an incentive to go around demanding more than 5 value-units.

A good negotiation algorithm degrades smoothly in the presence of small differences of conclusion about what's 'fair', in negotiating the division of gains-from-trade, but doesn't give either party an incentive to move away from what that party actually thinks is 'fair'.  This, indeed, is what makes the numbers the parties are thinking about be about the subject matter of 'fairness', that they're about a division of gains from trade intended to be symmetrical, as a target of surrounding structures of counterfactual actions that stabilize the 'fair' way of looking things without blowing up completely in the presence of small divergences from it, such that the problem of arriving at negotiated prices is locally incentivized to become the problem of finding a symmetrical Schelling point.

(You wouldn't think you'd be able to build a civilization without having invented the basic math for things like that - the way that coordination actually works at all in real-world interactions as complicated as figuring out how many apples to trade for an orange.  And in fact, having been tossed into Golarion or similar places, one sooner or later observes that people do not in fact successfully build civilizations that are remotely sane or good if they haven't grasped the Law governing basic multiagent structures like that.)