Tricky Punctuation: “etc.” at the end of a sentence

Many abbreviations have a period at the end, for instance, “Feb.” and “etc.”

Sentences also can have a period at the end. So what do you do when an abbreviation occurs at the end of a sentence? You might wonder if two periods are needed, one for the abbreviation and one for the sentence, e.g., “milk, bread, eggs, etc..”

In fact, when the term “etc.” ends a sentence, the Chicago Manual of Style states that one period is used.

Incorrect: “milk, bread, eggs, etc..”

Correct: “milk, bread, eggs, etc.”

In this case, the period performs two functions: it ends the abbreviation and it ends the sentence.

However, what happens when “etc.” occurs just before a question mark? After all, a question mark does contain a “period” underneath the squiggly bit.

The answer is that the period within the question mark cannot do double duty as a period for the abbreviation. In the English writing system, the question mark is a single unit that cannot be separated into its component strokes. You hence need a separate period for the abbreviation.

Incorrect: “milk, bread, eggs, etc?”

Correct: “milk, bread, eggs, etc.?”

This is true for exclamation marks as well.

Tips to avoid having your research paper rejected by journals

I edit many papers after they’ve been rejected or sent back to the authors for major revisions. Often, I see the peer-review comments as well, and I see many mistakes come up again and again. Rejection is an inevitable part of academic publishing, but it is possible to minimize it somewhat. To give your paper the best possible chance of publication, I recommend the following.

To avoid being rejected by the editor during an initial screening:

  • Choose the journal best matched in scope.  Find some candidate journals from their “Aims and Scope” description. You can then use Google Scholar’s advanced search to look for recent papers published in these journals that also include keywords in your paper.  This is an important step because the Aims and Scope descriptions of  many journals are vague and out of date. Google Scholar may tell quite a different story.
  • Choose a journal with a reasonable impact factor that is likely to publish the level of work you are doing. Again, look at typical published papers. If they are much better than yours (e.g., many experiments comparing the proposed method with a large number of state-of-the-art methods on massive datasets whereas you only test two performance metrics and compare your method with the baseline method on a tiny dataset), improve your evaluation or choose a lower-impact journal. Methods that only solve a small, very specific problem will also best fit in a specialized, lower-impact journal.
  • Make sure your language is free of grammatical errors and typos. Editors and peer reviewers are often people that work hard on their English, especially if it is their second language. They have little patience with easily avoidable mistakes.

Peer reviewers are looking for two things: methods that work and methods that are novel. To avoid being rejected by peer reviewers, I recommend the following basic steps:

  • Make sure your novelty is clearly outlined in the abstract. Outline it again in the Introduction. Then, make sure your “Related Work” section supports the novelty you claim by showing that no one else has done quite what you are doing. Summarize the novelty again in the Conclusion.
  • After compiling your Related Work, go through recent papers, and see how they evaluated their method. For instance, in deep learning, the batch number used to train the neural network is reported. If you don’t report this, peer reviewers will want to know what it is. They will also want to know why you missed such a simple thing. In addition, metrics change over time. BLEU is often used to evaluate natural language processing systems, but there have been other recently proposed metrics that may be better. Also make sure you’re using a large, popular dataset for testing instead of a few ancient test images like Peppers.
  • Again, make sure the language is clear and easy to read. If peer reviewers have to work to understand your work, they will get irritated and think you are not a careful researcher. Other mistakes that they find in your research (which they might politely ask you to correct in a revision of a well-written paper) will become mistakes that they use to reject your paper outright if your paper is also poorly written.

I hope these tips are helpful, and I wish you the best of luck with your research, whatever journal you choose for submission.

Why is formal language used in academic writing?

66ème Festival de Venise (Mostra)

I don’t believe that there is one correct way of speaking and that those who don’t use it are uneducated and/or stupid. Language is a fantastically complex human activity. One formal style is not flexible enough for the full range of human communication needs.

However, academic writing for conferences or journals is a special case. Using formal English is like putting on a good outfit and brushing your hair for a job interview. If you clearly care about correct style, this implies that you also care about other good research practices, such as doing a thorough literature review or ensuring your data are accurately reported. This makes the reader more disposed to believe what you are saying, which is to your advantage.

Formal English should also be used because academic writing is intended for an international audience. It isn’t respectful to ask readers with variable levels of English to puzzle over slang terms and idioms in order to understand the actual ideas presented in a paper. In contrast, formal English has been carefully formulated to be precise and clear. Ultimately, it’s to also your advantage to ensure your research is as widely disseminated as possible among everyone, and that includes the vast number of non-native speakers.

Finally, academic publishing is extremely competitive. If you want to be published, it’s best to use every trick you can to make your paper look better than the other papers submitted for publication.

In real life, formal English is not necessary or even a good idea. In an academic paper, however, I recommend keeping the language formal.


Articles and Abbreviations: Which is correct, “a UFO” or “an UFO”?

The basic rule for articles in English is that you use “a” for words that begin with consonants and “an” for words that begin with vowels.

However, if you are talking about abbreviations, especially in science papers, this basic rule doesn’t work. In fact, the choice between “a” and “and” is based on the pronunciation of the word, not the spelling. For instance, “UFO” (which stands for unidentified flying object) begins with the vowel “U” but is pronounced “you-eff-oh.” Hence, the pronunciation starts with the consonant sound “y” and “a UFO” is correct.


an AMD chip because it is “an ay-em-dee chip”

a GPS device because it is “a gee-pee-ess device”


an SRT because it is “an ess-are-tee”


There are exceptions! This happens when abbreviations are easy to pronounce as words. For instance, “a MATLAB program” or “a SIFT feature” are correct because these abbreviations are pronounced as if they were words.

How do you know if this is the case? For instance, is it “a HOG feature” or “an HOG feature”? There is no easy answer unless you spend time with researchers in this speciality and hear them talk. The other option is to google both phrases (surrounded by quotes) and look to see which is more commonly used.

Another notable exception to the basic rule occurs in fields such as physics and semiconductors, where chemical names are used. For instance, Si, which stands for silicon, is actually read out as “silicon,” not “ess-i,” so it is “a Si-wafer chip,” not “an Si-wafer chip.”


“U F Off”by pic fix is licensed under CC BY-NC-ND 2.0


Since or Because?

Since Donald Trump has become president, there have been many protests across the USA.

In normal English, the term “since” can mean “because” or a period of time after an event. Both uses are fine. However, in the above sentence, the meaning of the author is not clear. Does the author mean the protests happened because Donald Trump became president, or does the author mean the protests happened after Donald Trump became president?  The two concepts are closely related (and perhaps the author means both), but in academic writing, a sentence like this should be avoided. It is important for the meaning of the language to be precise so that the ideas are clearly expressed.

To avoid ambiguity in academic writing, it is best to use “since” only to refer to time and use “because” elsewhere. Hence, the author would write

Because Donald Trump has become president, there have been many protests across the USA.

to convey the cause of the protests, and

Since Donald Trump has become president, there have been many protests across the USA.

to convey when the protests happened.protest against donald trump

The Oxford Comma

Consider the following sentence:

We fed the puppies, Bobbles, and Fluffy.

In English, for lists of more than three items, the items are separated by commas, that is, all except for the last item, which must be separated by the word “and.” The “and” signals that this is the end of the list. However, is it also necessary to use a comma in this case?

We fed the puppies, Bobbles and Fluffy.

In British English and much English taught in Asian countries, it is not necessary. The  “and” takes the job of the separator, so a comma is seen as redundant.

I used to write this way as well. However, not using the Oxford comma can lead to situations in which the text is ambiguous. This is because a comma has more than one purpose in English. In addition to separating a list, a comma can separate two parts of a sentence.

So the above sentence could be interpreted to mean that we fed two puppies, one named Bobbles, and one named Fluffy, when we really meant that we fed the puppies, and then we fed two more pets, one pet named Bobbles and one pet named Fluffy, who are different from the puppies.

A recent court case that hinged on the Oxford comma was recently decided in the favor of delivery drivers who wanted overtime pay. The regulations were written in a similar way to the above. The regulation that stated what is not covered by overtime is as follows:

The canning, processing, preserving, freezing, drying, marketing, storing, packing for shipment or distribution of:

(1) Agricultural produce;

(2) Meat and fish products; and

(3) Perishable foods

They meant that both packing for shipment and distribution are not covered by overtime pay. However, this sentence could be read as packing for shipment and packing for distribution are not covered by overtime pay. Hence, distribution must be covered.

The court ruled that the comma was needed, and therefore overtime should be paid to the drivers who distributed the goods.

It is hence best to use the Oxford comma, especially in academic writing, where the precise interpretation of text is essential. It is also recommended even when writing in British English.

I notice you don't use an oxford comma. I too like to live dangerously.


Spelling Errors to Watch For

A trail through the woods
A “trail,” not a “trial.”

A spell checker is an excellent tool, but it is not foolproof. For instance, if a misspelled word is also an English word, the spell checker will not catch it. I often see the following errors in my edits:

  • “form” instead of “from”
  • “expect” instead of “except”
  • “leaning” instead of “learning”
  • “trail” instead of “trial”
  • “filed” instead of “field”

If any of these words pop up in your paper, it is worth having a quick check for their common misspellings.