We run our own ads, saying the moon shot is a great idea. but our critics just run more ads saying the opposite

The arguments go on and on, we answer every claim but the seeds of doubt are sown. Fewer and fewer people donate money. And what money we do have is going on advertising instead of building the gun! We have to stop this now! But how?

Should we find out who is paying for these ads and try to persuade him in person? Or should we ignore him as a troll? Or do something else?