A computer program and related data processing methods adapted for use in computational decision-making. The underlying program uses a hierarchical structure of positions and arguments along with linkages which define functional relationships between different positions and arguments. The positions are primarily characterized by position values that may represent outputs although the positions also have other functional features. The arguments are characterized by argument values that may represent inputs. The values of arguments associated with particular positions are combined to determine the value of that position. Supporting arguments increase position value while objecting arguments reduce position value. The program includes an iterative loop that runs until stable values are achieved for all positions and arguments. Position values are calculated position by position. Once a position is selected its arguments are collected and mathematically combined to arrive at a modified position value. Thereafter, this new modified value is used in adjusting the values of other positions and arguments having linkages with the selected position.