1) Accept that your data gathering techniques will never be 100% accurate. Work to improve them whenever possible. Use the best information available to make the most informed decisions possible.

2) Accept that your data gathering techniques will never be 100% accurate. Cease improving measurements. Cease making measurements. Make all of your decisions without benefit of any measurements whatsoever.

3) While the wise among us pursue path number one, sit in the background and carp every time the wise among us find a flaw to correct in data-gathering techniques.

PS: Stick to engineering -- you don't have the temperment for biology.

(Ugh. You guys really do bring out the worst in me.)