Metal = metal element.
Element = what is incapable of decomposition.
Hence
Metal = metal incapable of decomposition.
It is almost needless to point out that the form of these arguments does not suffer any real modification if some of the terms happen to be negative; indeed in the last example “incapable of decomposition” may be treated as a negative term. Taking
| A = metal | C = capable of decomposition |
| B = element | c = incapable of decomposition; |
the propositions are of the forms
A = AB
B = c
whence, by substitution,
A = Ac.