Processing device

A processing method comprising, by an information procesing device:

• acquiring, from a decision tree that is a learned model and includes a plurality of nodes, score information representing a value according to a number of pieces of data that fell to each of the nodes, among a plurality of pieces of training data used for training of the decision tree;
• and
• on a basis of the acquired score information, specifying a possible range that a value of an unknown feature takes, the unknown feature being a part of a plurality of features included in the training data.

A non-transitory computer-readable medium storing thereon a program comprising instructions for causing an information processing device to execute processing to:

• acquire, from a decision tree that is a learned model and includes a plurality of nodes, score information representing a value according to a number of pieces of data that fell to each of the nodes, among a plurality of pieces of training data used for training of the decision tree;
• and
• on a basis of the acquired score information, specify a possible range that a value of an unknown feature takes, the unknown feature being a part of a plurality of features included in the training data.