論理的思考7 権威に対して訴える

Authority can be convincing, but is it infallible?

論理的な議論をする際の、権威と専門家の役割について考察しよう。

Warm Up

Take a look at this advertisement from the 1930's:

It says:

20,679 physicians say Luckies are less irritating. Toasting removes dangerous irritants that cause throat irritation and coughing.

How much should we trust these physicians? Why do you think they said such a thing?

Language

Thinking logically, we can call experts into question. What kind of things can you call into question to weaken a claim from authority?

Some phrases for evaluating authority are shown below. Using softer language to do this is more suitable. Why? We can use phrases like:

Personally, I think it's important that we...
   
...consider (the reason for...)

I feel the need to...
...question (why...)

I suppose we can...
...take a look at (this a little more deeply.)

 

Practice

Below are some claims by authority. Consider how valid they are, and think of any questions that you can ask to weaken the argument. Some of these may be perfectly valid, while others are partially valid or completely invalid.

  1. Scientists state that nicotine improves brain function.
  2. Doctors have linked peptic ulcers to the stress of modern life.
  3. A study on rats, funded by the Sugar Association, found adverse effects of consuming an artificial sweetener. The manufacturer responded by sponsoring its own team of experts to refute the study.
  4. According to Google's reports, their self-driving cars are 100% safe.