5. A medical diagnosis support apparatus comprising: at least one processor; and at least one memory, said processor and memory being operatively coupled to function as: a training data obtainment unit configured to obtain training data; a candidate creating unit configured to create a plurality of inference means candidates based on the training data; an inference performance evaluation unit configured to evaluate an accuracy or likelihood of the plurality of inference means candidates based on an inference result and correct diagnosis included in the training data; an information validity evaluation unit configured to evaluate the validity of information presented by each of the plurality of inference means candidates based on reason information and correct reason information included in the training data; and a selection unit configured to select an inference means from the plurality of inference means candidates based on (1) the accuracy or likelihood of the plurality of inference means candidates and (2) the validity of the information presented by each of the plurality of inference means candidates.
5. A medical diagnosis support apparatus comprising: at least one processor; and at least one memory, said processor and memory being operatively coupled to function as: a training data obtainment unit configured to obtain training data; a candidate creating unit configured to create a plurality of inference means candidates based on the training data; an inference performance evaluation unit configured to evaluate an accuracy or likelihood of the plurality of inference means candidates based on an inference result and correct diagnosis included in the training data; an information validity evaluation unit configured to evaluate the validity of information presented by each of the plurality of inference means candidates based on reason information and correct reason information included in the training data; and a selection unit configured to select an inference means from the plurality of inference means candidates based on (1) the accuracy or likelihood of the plurality of inference means candidates and (2) the validity of the information presented by each of the plurality of inference means candidates. 14. The medical diagnosis support apparatus according to claim 5 , wherein the information validity evaluation unit is operable to evaluate the validity of the information by changing processing based on the performance of the inference means candidates.