The single principle is that there is
really no such thing as "science"! Science is merely systematized,
institutionalized common sense. The infant (human or other animal)
learns from trial and error experience what to eat, avoid, mate with,
etc. That learning from trial and error experience is already
"science". Doomed is the forager who is not a "scientist" -- who does
not learn to avoid the grains that have made him sick in the past,
favour the terrains that have been plentiful, crack the nut before
sinking his teeth into it. Doomed too is the organism that is
indifferent to the outcome of his experiments: the one that keeps
sticking his nose back into the fire. We humans have a second way of
doing science, over and above individual trial-and-error (experimental)
learning, guided by the error-correcting feedback arising from the
consequences of our actions: We also have language, and can save one another
a lot of risky and time-consuming experimentation by telling one another what's what. We
can of course lie, or be in error. So our statements can be true or
false. But the true ones ("Don't eat the mushrooms with the stripes:
they will make you sick" or "Find a rock and smash the nut and you will
find something good to eat inside") are our second way of doing
science: By describing the outcomes of our experiments, and sharing
them with others, to use, apply, test, build-upon.
Stevan Harnad