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Ethical questions The surgeon’s work was hailed as a game-changer in regenerative medicine when, in 2011, he implanted a plastic artificial trachea, using bioengineered stem cells, into a patient whose own windpipe had been damaged. Over the next three years, he carried out seven more synthetic trachea implantations — two more at the Karolinska, one in Illinois and four in Russia, where he heads a tissue engineering project. Six of the eight patients have died (from causes unrelated to the transplants, Macchiarini says), and one has been in intensive care since the procedure.

The tracking of terrorists on social media should take a cue from nature, Dr. Johnson said, where “the way transitions happen is like a flock of birds, a school of fish.”

The natural sciences often offer themselves as a model to other disciplines. But this time science might look for help to the humanities, and to literary criticism in particular.A major root of the crisis is selective use of data. Scientists, eager to make striking new claims, focus only on evidence that supports their preconceptions

Despite the popular belief that anything goes in literary criticism, the field has real standards of scholarly validity.

In his 1960 book “Truth and Method,” the influential German philosopher Hans-Georg Gadamer argues that an interpreter of a text must first question “the validity — of the fore-meanings dwelling within him.” However, “this kind of sensitivity involves neither ‘neutrality’ with respect to content nor the extinction of one’s self.” Rather, “the important thing is to be aware of one’s own bias.” To deal with the problem of selective use of data, the scientific community must become self-aware and realize that it has a problem. In literary criticism, the question of how one’s arguments are influenced by one’s prejudgments has been a central methodological issue for decades.

Between 1997 and 2007, the rate of autism and organic food sales has risen at the same rate. Obviously, this chart goes to prove that autism and eating organic foods are related to each other and you should avoid organics all together, right? Wrong. This chart is one of the best examples I’ve ever seen detailing how correlation and causation can have absolutely nothing to do with each other. In fact, in many cases, correlation and causation have nothing to do with each other – but what exactly does that mean?

In Latin, the phrase generally used is “cum hoc ergo propter hoc” which translates more literally to “With this therefore because of this.” The opposite, however, is true. Causation proves correlation, but not the other way around.

If a correlation is established, how can you determine causation? Are they caused by the same thing? Does one cause the other? Are they completely unrelated? In order for one event to cause another, they must be related. In other words, there must be some real mechanism connecting the two events (assuming the correlation isn’t completely coincidental). Here, the cause and effect mechanism must comply with the known laws of nature – this (at least) gives us somewhere to start.

We need to be aware of our natural born optimism, for that harms good decision making, too. The neuroscientist Tali Sharot conducted a study in which she asked volunteers what they believed the chances were of various unpleasant events’ occurring — events like being robbed or developing Parkinson’s disease. She then told them what the real chances of such an event happening actually were. What she discovered was fascinating. When the volunteers were given information that was better than they hoped or expected — say, for example, that the risk of complications in surgery was only 10 percent when they thought it was 30 percent — they adjusted closer to the new risk percentages presented. But if it was worse, they tended to ignore this new information. This could explain why smokers often persist with smoking despite the overwhelming evidence that it’s bad for them. If their unconscious belief is that they won’t get lung cancer, for every warning from an antismoking campaigner, their brain is giving a lot more weight to that story of the 99-year-old lady who smokes 50 cigarettes a day but is still going strong.