it was 64 people.
edit: and also, even 29 or something like this is a lot, assuming that they are selected kind of randomly and not all belong to the same social group etc. If only 3 showed a reaction like described, sure. We need more data. but with a hitrate of 100%, what do you expect to happen if you 10x the number?
it was 64 people. edit: and also, even 29 or something like this is a lot, assuming that they are selected kind of randomly and not all belong to the same social group etc. If only 3 showed a reaction like described, sure. We need more data. but with a hitrate of 100%, what do you expect to happen if you 10x the number?