oblique condition

In a decision tree, a condition that involves more than one feature. For example, if height and width are both features, then the following is an oblique condition:

Contrast with axis-aligned condition. See Types of conditions in the Decision Forests course for more information.

Practitioners refer to oblique condition when building, training, or evaluating machine learning systems. It appears in research papers, product documentation, and technical discussions about AI capabilities and limitations.