My skepticism was overcome when I realized that IF it's true (back in my days of deliberating if) then the grubberment definitely knows about it. Of course, it's all highly compartmentalized thus 'trying' to keep a lid on things. But even with all that. In my lifetime it would have to come out.
the deathbed confessions...
The Air Force manual from 1969 that taught cadets that they've been here for 50,000 years... see here and here
Even if all the insiders in the grubberment aren't totally sure that they have been here that long. They seem damn sure they've been here the last few thousand.
Now that's just how I overcame it.... that may not be everyone's path obviously.
Like the deathbed confessions.... they had to come, right? With a story this big, this long, if there truly were deep secrets being kept for the greater good. Someone on their deathbed would surely say something.
And they came. From highly unlike sources too... but they came. These weren't people saying "I'm pretty sure I saw some funny lights one night". No these are people saying. They are here and we've been in cahoots with them.