One problem in these discussions is how each views the words. It is very hard to truly define morality or conscience so this is how I see them
I agree that we define the key words differently. Perhaps our discussion should have started there.
Morality is the set of shared attitudes and practices that regulate individual behavior to facilitate cohesion and well-being among individuals in the group. Conscience is an individual’s judgment about what is morally right or wrong, typically, but not always, reflecting some standard of a group to which the individual feels attached.
To me, the judgments of conscience are moral intuition, emerging immediately from the unconscious despite the fact that the situations they judge are as unique as snowflakes.
You may see them defined differently which can cause difficulties in discussions. I have tried many times to use plato.stanford.edu for definitions but have always felt more confused by the end of the discussion than when I started from indicating the difficulty defining these words.
All but a few moral philosophers begin their arguments based on the premise that the judgments of conscience are the product of reason. This basic premise is false. David Hume was an exception. He thought they were FELT (as intuition). He was right.
Never the less I do agree there are commonly shared behavior patterns among humans derived from evolution. These shared behaviors are common throughout the human species but with variation. The fact that there is variation is one problem with any universal moral or conscience pattern. In additions our brains are designed to learn patterns of behavior after birth which are influenced by our social surrounding.
What you think of as VARIATIONS among the cultures, I see as CULTURAL BIASES. For example, If we lived in the year 1850, when half the nations of the world had abolished legal slavery and the other half had not, it would seem to us that the consciences of the world's cultures were different. But the fact is that the conscience-motivated abolition of slavery was only halfway done removing the cultural bias of slavery from the world. The task wouldn't be completed until the year 2000.
There are no universal conscience behavior and no absolute morals
.If by absolute morals you mean that no act is always wrong or always right, I agree. But the judgments of conscience are not subjective, like opinions on art, music and literature. A group of people, unbiased on the
relevant case, is the objective standard for morality and fairness recognized in courtrooms all over the world.
This test is moral testing has two major problems to draw sufficient conclusions. One there is a pre-selective pattern of those who join the test on line. Second the questions do not create the actual experience where one would have to make the decisions and therefor a more detached answer can be given. I am not actually going to kill someone so I can answer what I cognitively think should happen especially when the outcomes are absolute and known.
I am not saying the study does not give us information, it does but with significantly limitations. It shows that most humans see the needs of the group to be greater than the needs of a single individual in general in extreme situations of life and death and that on average things are more permissible than they are obligated or forbidden. Thus most humans believe than these decisions can be left up to the individual.
I see the MST as flawed but for different reasons. To me, it's remarkable that a test of moral intuition, designed on the premise that a universal intuitive conscience exists still seems to come up positive even though the questions combined both intuition and hit-or-miss reason.
My guess is that the instinct to select the option in a moral dilemma that causes the least harm is also universal and the weighing of the consequences of each option wasn't so difficult that it threw judgment off course.