|         |          |                  |          |
| f_11 | f_1011 | 1 0 1 1 |  (p (q)) | not p without q  |  p =&gt; q  |
|      |        |         |          |                  |          |
| f_12 | f_1100 | 1 1 0 0 |   p      | p                |  p       |
|      |        |         |          |                  |          |
| f_13 | f_1101 | 1 1 0 1 | ((p) q)  | not q without p  |  p &lt;= q  |
|      |        |         |          |                  |          |
| f_14 | f_1110 | 1 1 1 0 | ((p)(q)) | 