Comment by mdp2021

Both Charles Darwin and Benjamin Franklin are quoted in informal Decision Theory. Both used pro-vs-cons tables to orient decision; Franklin also used weights.

> When those difficult cases occur, they are difficult, chiefly because while we have them under consideration, all the reasons pro and con are not present to the mind at the same time; but sometimes some set present themselves, and at other times another, the first being out of sight. Hence the various purposes or inclinations that alternately prevail, and the uncertainty that perplexes us. // To get over this, my way is to divide half a sheet of paper by a line into two columns; writing over the one pro, and over the other con. Then during three or four days consideration, I put down under the different heads short hits of the different motives, that at different times occur to me, for or against the measure. // When I have thus got them all together in one view, I endeavor to estimate their respective weights; and where I find two, one on each side, that seem equal, I strike them both out. If I find a reason pro equal to two reasons con, I strike out the three. If I judge some two reasons con, equal to some three reasons pro, I strike out the five; and thus proceeding I find at length where the balance lies, and if, after a day or two of further consideration, nothing new that is of importance occurs on either side, I come to a determination accordingly