2. A fuzzy rule acquisition method according to claim 1, further comprising: a step of determining that there is a missing fuzzy rule if said step (d) determines that there is no contradiction for all of said fuzzy rules.
2. A fuzzy rule acquisition method according to claim 1, further comprising: a step of determining that there is a missing fuzzy rule if said step (d) determines that there is no contradiction for all of said fuzzy rules. 3. A fuzzy rule acquisition method according to claim 2, further comprising the seeps of: obtaining at least one of the errors and at least one of grades of said propositions based on said inference error by referring to at least one of combinations of IF parts of said fuzzy rules, combinations of THEN parts of said fuzzy rules, and both of the combinations of the IF parts and the THEN parts of said fuzzy rules; and if it is determined that there is a missing fuzzy rule, generating said missing fuzzy rule based on at least one of the errors and grades of said propositions.