Why don't you just answer the question, or can't you?
Oh, Newby, you just love calling me out don't you?
I tell you what, give me an example of what you mean by something for which there is no empirical data or physical evidence that is part of life and I'll tell you how I personally apply logic and/or how logic can or is applied to it.
For example, love. All higher order mammals require love to survive, at least survive the first part of life. Because of evolution most animals are born not very developed, especially primates. Human beings take about 25 years to fully develop both physically and mentally. If it weren't for your parents love, you wouldn't fully develop or, if we were still hunter/gatherers, survive. Offspring, among human beings, have a better chance at survival if they have two parents.
If those two parents don't love eachother, the offspring doesn't have a healthy example of what a loving relationship with a mate is. Having a loving partner has logical positive characteristics: rent is cheaper, utilities are cheaper, tasks can be shared i.e. one does the cooking and the other cleans (or if the wage to cost of living was like it was 30 to 40 years ago before Reagan let corporatism run rampant - one partner could work while the other ran the household and raised the offspring).
If you think of human beings as having evolved into pack, or tribal, animals, the tribe would care for it's own which also allows for team work - a simple equation of small economics. More people working together = more efficiency.
If your partner is treating you badly, abusing you, or leeching off of you, the logical and practical decision is to strike out alone and, hopefully, find another partner who is supportive and willing to share the load and the rewards.
Now, you can riposte with, "Well, I don't love my partner for those real world reasons." but, in some ways, you do. That's how evolution works. We evolved to love, and the reason we did is because love helps us to survive. Those human beings that didn't love were less likely to survive, and those of our offspring who know how to love will have a better chance at survival and at having offspring who survive.
Because human beings learn, evolution isn't just biological. We can evolve at will, to a certain degree i.e. warm clothing, fire, and warm shelter in winter. Then we can migrate to cooler climes in the summer (if you're wealthy or lucky these days) as hunter/gatherers did in millenia past and go where the food is. In a way, technology has evolved because of the human capacity to evolve at will.
I saw a program where a physical anthropologist discussed that human beings evolved the ability to appreciate natural beauty (like sunsets and mountains and wildflowers - not just big boobs or tight abs and pecs - like mine *flex*) and her reasonsing was utterly logical and made perfect sense. I'm not saying she's right, and she could be wrong, but, at the same time, she might be right.