Not sure there is a "valid source" anymore. Seems every site, every person, every everything and everybody has their own agenda and caters to what ever they want to promote. Much of it profit motivated, much of it total disregard for what's in it for everyone. My latest example it the position of Boeing in the latest 737 Max accidents. Everyone else grounded the planes except the US and when it was finally mandated Boeing agreed stating "an abundance of caution". So, where is or who is, a "valid source". Wait, is it on the internet, silly me, then it must be true
