Precedent review

You will see 25 news items. For each one we show what our engine retrieved — earlier developments on the same programme, and competing programmes working on the same mechanism — together with the implications it drew from that evidence.

Your job is to tell us where it is right and where it is wrong. There are no correct answers; a disagreement is as useful to us as an agreement.

Your answers save automatically as you go. You can close the tab and return to this address to pick up where you left off. Nothing is sent anywhere until you download the results file at the end and choose to share it.