One of my favorite quotes: "Who could believe an ant in theory? A giraffe in blueprint? Ten thousand doctors of what's possible could reason half the jungle out

One of my favorite quotes: "Who could believe an ant in theory? A giraffe in blueprint? Ten thousand doctors of what's possible could reason half the jungle out of being". Naysayers could be right according to existing models, what they cannot predict is how things may change. Just because some guy wrote you a message shouldn't be a downer. The two choices you give are not comprehensive. Another choice is to still go ahead with the plan but taking some of his points into account. Giving up before you've tried anything is not very entrepreneurial.