The proper trick is not just ignoring those who say it can't be done. It also helps to ignore people who say it can be done. PHBs are a prefect example.
If they say "impossible" you have probably already done it and it became industry standard two years ago.
If they say "that's easy" it violates several physical laws, most safe practice, and any code of ethics that doesn't include cannibalism as a daily ritual. (With all due apologies to cannibals for comparing them to PHBs)