There are all
kinds of facts: historical facts, judicial facts, scientific facts, among
others. And now there are “alternative facts.” The difference is there are
rules for determining historical, judicial, and scientific facts. The rules of evidence,
for example, control what kinds of things a finder of fact (judge or jury) can
hear or see in reaching a verdict (from the Latin roots for “truth” and “say”).
Gazing down at their
hand-held devices, people implicitly accept the facts of the science that make
them possible. The same is true of any technology: It’s applied science. Expecting
it to work entails not only accepting the particular scientific facts and laws
that make it work, but also the methods by which such facts and laws are
generally determined.
Everybody expects
technology to work. How can some of us selectively deny other scientific facts validated
in the same way?
One of the
reasons courses in the natural sciences are required even in high school (at
least when I was in school – maybe still in public schools) is to teach
scientific method and logic, that is, the experimental method and the inductive
logic that drives it. Understanding what is true about science helps children
become citizens who are less likely to be fooled by superstitions and charlatans.
Inductive logic
is one of the foundations of science. It says that if a phenomenon is observed
once, it may be unique. But if it is observed regularly, it becomes possible to
explain the cause and result as a law of nature.
Consider my cat,
Jenny Kaye. One of the games she likes to play is to push an object bit by bit
to the edge of the table until it falls off. Maybe she just likes to see them
fall. They always do. But maybe Miss Jenny Kaye Newton is testing the law of
gravity. I can suppose it’s an experiment. Maybe one of these objects won’t fall. That would be even more fun.
Unlike Jenny
Kaye, science has rules for deciding what a “regular” observation is:
controlled conditions, calibrated instruments, etc. The number of observations
is important too. That’s where statistics comes into play, just as it does in
political polling, or when actuaries calculate the likelihood of morbidity. Pollsters
may not always get it right, but actuaries make life insurers a lot of money by
telling them how much to charge for bets on whether their customers will live.
Now consider the
data points climate scientists gather in order to calculate global warming. Who
knows how many they gather every day? They’re gathered over the whole of
earth’s surface, land and sea, at regular intervals every day, and they have
been for years and decades, in the United States since 1880. Is it more daily
data points than Twitter has tweets (58 million) in a day? Or than YouTube has
views (4 billion as of 2012) in a day? Maybe not, but it’s more than enough to
be statistically significant.
It’s more than any
one denier can gather by looking out into his back yard occasionally on an unseasonably
cold day, thinking “the globe isn’t warming much around here today is it?” And
feeling very clever about his insight. Maybe this denier should, like my cat, keep
gathering data. Very few communities, if any, have not set a temperature record
or records in the last ten years. So the denier might have to take a reading
every day for ten years at the same time each day before he could be in a
position to defend his denials rationally, and then only about the climate in his
own community. So why do people who aren’t equipped to gather and analyze
climate data nevertheless deny the results deduced by those who can?
To say nothing of
what the physicists and chemists have shown about human causality, that is, the
release of greenhouse gases as a regular practice for running human societies
and economies. I won’t try to describe what they measured and explained. I
probably wouldn’t get it quite right. I’ll just point out that I might with
equal justification deny that there’s any causal connection between what I am
typing on my keyboard and what appears on my computer screen.
People who think
climate changes are not due to human activity (like Scott Pruitt, tabbed by
Trump to head the Environmental Protection Agency), or that an ingredient in
vaccines causes autism (like Robert F. Kennedy Jr., who might like to lead an
investigation of the ingredient at public expense), I’m sorry to say, are no
smarter than my cat. At any rate they apply inductive logic no better than she.
Or other systems of belief are interfering with their implicit belief in the
everyday truths of science and technology.
It’s easy to see
which belief systems are influencing highly-placed climate change deniers:
large accumulations of capital are threatened by policies designed to limit the
release of greenhouse gases. Whether and to what extent the opposed policies
might have a rational basis other than
in the denial of scientific facts, has to be the topic for another post.