@Hypocrisy_Central “Don’t most people use logic to decipher the best course of action to get the best outcome? If that is the aim, then why not use it to that aim regardless of emotion.”
Yes, that is one way of using logic. But it is also the use of logic where it is the most clear that one cannot “use it to that aim regardless of emotion.” Emotions are important elements of what makes something the best outcome. They cannot be ignored, therefore, when reasoning about which courses of action are best.
“As in your example, say there were two houses, close to the same size, one in better shape the other rough around the edges. If the rougher house had a way better deal, and would be paid off quicker at less per month it would be logical to choose that one.”
Not necessarily. The advantages of paying off the house quicker must be balanced against other factors. Is the house so rough around the edges that it is likely to fall apart soon after (or even before) you pay it off? Are you capable of doing any necessary repairs yourself, or will you have to pay someone else to do them? If you have to pay someone else, will the cost be more than the difference between the cost of the two houses? Are you hoping to just live in the house, or is it an investment (which might make the more expensive house a better candidate)? These are all factors you have ignored.
“Would it be logical to choose the other with a higher cost, more per month and a crappier interest rate simply because a favorite grandmother had a house like it and to get it would lend to some connection with the departed grandmother?”
It depends on how valuable that feeling is to you. If we don’t make your false assumption that to be logical is to be a Straw Vulcan, then we can see that it makes perfect sense to take account of happiness (both ours and that of others) when making decisions. I don’t buy the cheapest brand of pasta sauce when I go to the grocery store. Why? Because I don’t like it and won’t eat it. Surely it would be more illogical to pay less money for a brand of pasta sauce that I don’t like and won’t eat than to pay more money for a brand of pasta sauce that I do like and will eat. Otherwise, why buy the sauce at all? Buying the cheap sauce that I won’t eat is just plain wasteful. But that preference for one sauce over the other is an emotion.
This isn’t to say that the story ends there, of course. I might abstain from buying an expensive sauce because it stretches my budget too far or because I don’t like it so much more than I like one of the cheaper sauces as to make the more expensive one worth it. But this still appeals to preferences, such as my preference not to go bankrupt or to pay more for something than it is worth. Some people have so much money, however, that they don’t even need to worry about such things. They can afford to just buy whatever is their favorite all the time (though, presumably, they will balance their food purchases against other preferences—like their preference for being healthy, which may lead them to rein in their indulgences).
“Or would it be logical not to choose the other because you grew up in a home in that style terrorized by an alcoholic father?”
Again, it depends on how much avoiding those memories is worth to you. Psychological abuse can have many long-term effects. If living in a house that constantly reminded one of a terrible childhood was likely to lead one to suicide, I think it would be perfectly logical to buy a more expensive house that didn’t remind you of your childhood. So again, there are more factors here than you let on.