What are the presumptive argument structures?

The presumptive argument forms are:

Appeal to Expert Opinion-

A is an expert in subject B

A asserts C about B

C may plausibly be taken to be true about B

Position to know- In this form, you look at other people familiar with something, what they do, you should do. An example of this is:

Bob is not from New Orleans, and is not familiar with the laws there.

He doesn't know whether or not to yield to pedestrians.

He sees the other people are yielding to pedestrians, therefore he yields to pedestrians.

Popular Opinion- The use of polls or surveys to gather data. The argument structure for this is:

A is generally accepted as true.

If A is generally accepted as true, that gives a reason in favor of A.

There is a reason in favor of A.

Correlation to Cause-

If there is a positive correlation between A and B.

Therefore A causes B.

There is a negative correlation between A and B.

Therefore A prevents B.

Argument from Consequences-

If A is brought about, good consequences will probably occur.

A should be brought about.

If A is brought about, bad consequences will probably occur.

A should not be brought about.

Slippery Slope-A form of negative reasoning from consequence; once the first step is taken, it will lead to a chain reaction to a negative consequence.