Syllogism

This is a logical argument that says if something is in a minor group that is part of a major group, then that thing exhibits the characteristics of the major group.

• Major premise: All fish can swim
• Minor premise: Nemo is a fish
• Conclusion: Therefore, Nemo can swim

There are some other forms, like the negative form:

• No humans have four legs
• Some mammals have four legs
• Therefore, some mammals are not human

This is really just a restatement of the first form, with the group being “not human.”