Uncertainty Let action At leave for airportt minutes before flight Will A:get me there on time? Problems: 1. partial observability(road state,other drivers'plans,etc.) 2. 2. noisy sensors (traffic reports) 3. uncertainty in action outcomes(flat tire,etc.) 4. 4. immense complexity of modeling and predicting traffic Hence a purely logical approach either 1. risks falsehood:"A2swill get me there on time",or 2.leads to conclusions that are too weak fordecision making: "A2s will get me there on time if there's no accident on the bridge and it doesn't rain and my tires remain intact etc etc.' Uncertainty Let action At = leave for airport t minutes before flight Will At get me there on time? Problems: 1. partial observability (road state, other drivers' plans, etc.) 2. 2. noisy sensors (traffic reports) 3. 3. uncertainty in action outcomes (flat tire, etc.) 4. 4. immense complexity of modeling and predicting traffic 5. Hence a purely logical approach either 1. risks falsehood: “A25 will get me there on time”, or 2. leads to conclusions that are too weak for decision making: “A25 will get me there on time if there's no accident on the bridge and it doesn't rain and my tires remain intact etc etc.” (A might reasonably be said to get me there on time but I'd have to stay overnight in