One aspect that I think is directionally correct is that a is (up to the other things) divided by d. Where a is the number of pieces of evidence that this is a good idea and d evidence that it is bad. This (when all else is neglected) feels right. 10 points for and 5 points against seems like it would be close to 100 points for and 50 points against, rather than 10 times less relevant.
One aspect that I think is directionally correct is that a is (up to the other things) divided by d. Where a is the number of pieces of evidence that this is a good idea and d evidence that it is bad. This (when all else is neglected) feels right. 10 points for and 5 points against seems like it would be close to 100 points for and 50 points against, rather than 10 times less relevant.