Right, but first we have to establish that they actual fear this. Then we have to establish who they are, and what their qualifications are. Then, as non-expert

Right, but first we have to establish that they actual fear this. Then we have to establish who they are, and what their qualifications are. Then, as non-experts, if enough experts agree with the ones who are making the claim we can choose to worry or not to worry depending on circumstances.