[SMU Professor of Psychology and Director of the Behavioural Sciences Institute] David Chan was among academics gathered at a seminar held last Thursday to discuss population projections and the implications of a growing population. At the discussion, Prof Chan posed a more philosophical question, saying that Singapore had to decide what kind of society it wanted before trying to arrive at hard numbers. 'This is about consequences and outcomes, not about optimal population figures,' he said. 'We have to define the outcomes we want... what people think about Singapore as a country.'