"preponderance of evidence based on current knowledge"…is my thought on how to proceed in science and with policy actions related to science.
 We can agree or disagree he and what the evidence tells us – a group of blind and will see an elephant in very different ways,  depending on where they grab the elephant – but to truly know the elephant  They need to respect and hear the perspectives of others who are feeling the elephant from different places - and try to assemble it into an integra portrait.
 It's amazing to me that loud, ignorant and derisive - and special-interest funded - has led to a feeling of necessity to have a "March For Science".  
  But if we want to prevent ignorance, venality and self-aggrandizement from – again and again and again – "guiding" our world into disaster and avoidable horror ,
"Up front" respectable efforts may group help!