(data mining) A data-analysis method that recursively partitions data into sets each of which are simply modeled using regression methods. / A classification and regression tree.

(philosophy) The paradoxical situation whereby, if one accepts the cognitivist theory that every action is preceded by a thought, each thought must also be preceded by another thought, and so thinking could apparently never begin.

(derogatory, politics) A characterization of the left which suggests that it paradoxically holds reactionary views by its tolerance of illiberal principles and ideologies (such as extremist Islamism) for the sake of multiculturalism and cultural relativism.

(neologism, derogatory, politics) Characteristic of the regressive left.

(neologism, derogatory, politics) A member of the regressive left.

plural of regressive leftist

plural of regression tree

plural of regression to the mean

(derogatory, politics, rare) The politics of the regressive left.

(software engineering) Testing a program after a modification to ensure that areas that should not be affected by the update behave as they did in previous versions.