Final answer:
Bruce is likely strongest in the planning dimension of cognitive style due to his preference for data-driven decision making and risk assessment.
Step-by-step explanation:
Based on Bruce's comment that decisions should be backed by facts and data, his cognitive style likely aligns most with planning. Planning involves the careful consideration of data and strategy before acting. Bruce's preference for credible and precise analysis before taking risks indicates a methodical approach to decision-making, a hallmark of a strong planning dimension in cognitive style.