> why are we jumping the gun to the other things? Perhaps all those kinds of sensors could be cleverly combined in ways that make them more feasible/reliable,

> why are we jumping the gun to the other things? Perhaps all those kinds of sensors could be cleverly combined in ways that make them more feasible/reliable, not less. If we limit ourselves to designing it with the same specific conceptions of smell that we have, we might be unnecessarily making the job harder for ourselves, or missing easy optimizations that would make it more effective.