Start in a robustly useful setting: Choose a setting that seems analogous to important aspects of future systems, where interesting phenomena are likely to surface and useful proxy tasks are likely to exist.
Look for your lost keys under the lamp post first. Not because they are more likely to be there, but because you will find them faster if they are.
Look for your lost keys under the lamp post first. Not because they are more likely to be there, but because you will find them faster if they are.