Final answer:
A typical moral argument must have at least one moral premise and other premises that adequately support the conclusion, making a logical and compelling case for its moral stance.
Step-by-step explanation:
In a typical moral argument, at least one premise must be a moral premise and the other premise or premises must be able to adequately support the conclusion. A moral premise is a statement that asserts a value or ethical principle that is used as a foundation for moral reasoning. For an argument to be convincing, it requires a logical structure where the conclusion necessarily follows from the premises.
This is known as a good deductive inference. If the premises are true, then the conclusion must also be true. However, an argument can encounter problems if the premises are false, irrelevant, a form of circular reasoning, or inadequate to support the conclusion. Additionally, there may be alternative arguments with equal or greater support that challenge the reasoning of the original argument.