This time we will talk about the word “indeed”. “Indeed” is not very common in modern spoken English, but we still find it frequently used in scientific writing.
Authors use “indeed” to emphasize an example of what they just said. To clarify this, we will use an example discussing how many hours per week American doctors should work.
Being tired, of course, is something everyone understands. Indeed, a recent study showed that 80% of Americans surveyed would want to see a different doctor if they knew theirs had been working more than 24 consecutive hours. — DOI: 10.1056/NEJMsr1210160
The first sentence in the example has the general claim that most people understand being tired. The second sentence starts with “indeed” and then mentions another study confirming that general claim. Using “indeed” helps the reader know what to expect in the next sentence.