Only bureaucrats like paperwork. No non-bureaucrats are people who like paperwork. Many birds cannot fly. Some birds are not fliers. A car has four wheels.
All cars are things that have four wheels.
There are no blue Cardinals. No Cardinals are blue things. Each kind of categorical sentence describes a relationship between two sets that can be exhibited using a venn diagram, as illustrated above. In these diagrams, an empty region indicates uncertainty about whether or not there is anything that belongs in that region. Shading in a region indicates that nothing belongs in that region.