METHODOLOGY

Common Sense: If it looks like a duck, and quacks like a duck, then it is a duck.

Common Skeptic: If it looks like a duck, and quacks like a duck, then it is probably a duck.

Science (General): If it looks like a duck, and quacks like a duck,
then proceed to test the null hypothesis that it is not a non-duck.

Science (Physics): If it looks like a duck, and quacks like a duck, then the detector needs recalibrating.

Science (Biology): If it looks like a duck, and quacks like a duck, then it compare its DNA to other waterfowl in the family Anatidae to determine the degree of genetic relatedness.

Philosophy: If it looks like a duck, and quacks like a duck, proceed to question the existence of the universe and/or consciousness.

Buddhism: If it looks like a duck, and quacks like a duck, it is not a duck, but not a non-duck, nor is it both nor neither. Forget about the duck(!) and just watch your mind ducking.

After 50 years, it turns out that I'm a fan of common sense.