Why think pleasure and suffering are measurable on the same hedonistic scale? They use pretty different parts of the brain. People can make preference-based tradeoffs between anything, so the fact that they make tradeoffs between pleasure and suffering doesn’t clearly establish that there’s a single hedonistic scale.
For further related discussion, see some writing by Adam Shriver:
Why think pleasure and suffering are measurable on the same hedonistic scale? They use pretty different parts of the brain. People can make preference-based tradeoffs between anything, so the fact that they make tradeoffs between pleasure and suffering doesn’t clearly establish that there’s a single hedonistic scale.
For further related discussion, see some writing by Adam Shriver:
https://​​library.oapen.org/​​bitstream/​​handle/​​20.500.12657/​​50994/​​9783731511083.pdf?sequence=1#page=285
https://​​link.springer.com/​​article/​​10.1007/​​s13164-013-0171-2