Some folks still have to learn that lesson. Opinions that fossilize as they don't change simply fulfill their destiny as fossils.
Here, as changes at Ariad will occur, folk's original opinion changed but were backdated to include the change into the original position, instead of changing the opinion at the time of change, and admitting to a change. In my business (management consulting), we call that 'shiny hair' opinion, referring to the slicked hair of the ivy league consultants who believe themselves to always be 'the smartest person in the room', but never are. (Reference to McNamara.)
That is why many opinions here seem to always be to be dismissive of others' opinions even if the opinions are the same.
I admit to being wrong and changing my opinions on Ariad and HB here over time, as do most here. As I learned more, it became obvious that my original thinking was too channeled, and that I had dismissed all the warning signs as did many.
