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It seems accepted amongst typographers that the double space after a period is a dated artifact of monospace typewriters, but is it acceptable to use a double space in between sentences like:

I trust Dr. Wang. Dr. Wang is very experienced.

Sure, you could rework the wording or even make this a single sentence with a conjunction, but what's the best way to typeset these two exact sentences in a proportional typeface?

Doesn't a double space help?

I trust Dr. Wang.  Dr. Wang is very experienced.

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In German typography you use a spatium (half space) between title and name. That shows that title and name belong togehther. Then a space is okay afte the sentence point. I do not know if it is same in English. –  Kurt Aug 13 '13 at 10:38
    
I would be fine with a half-space after the "Dr." Although that's not common usage in English, there's nothing wrong with it. –  Lauren Ipsum Aug 13 '13 at 10:52
    
Personally in that example I'd use a semi-colon (or comma) sentence since the two statements are related (yet independent), though that's more of a grammar thing than a typography thing. It also can't be used for everything like this e.g. I've not met Dr. Wang. Dr. Kazarmous is a good doctor, I like her manner has the same problem and wouldn't suit a semi-colon or comma (though maybe a long dash or an elipsis would work here, to suggest an extended pause and change of subject...) –  user568458 Aug 13 '13 at 15:24
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So, LaTeX has embedded style rules (about which one can argue over correctness) that differentiation between a space between sentences and between words: tex.stackexchange.com/a/2236/13600. Compare standard LaTeX spacing, single spacing (advocated here) and double spacing: alecjacobson.com/weblog/media/… –  mangledorf Aug 24 '13 at 10:34

4 Answers 4

NO, no, no, no, no. Double spaces are never necessary when using proportional fonts. Not if your sentences are one word each, two words each, two paragraphs each, or six pages long.

The best way to typeset those two exact sentences in a proportional font is correctly: with one space after the period.

Two spaces just makes my eye trip. Genuinely. I feel myself tripping over the D of Dr. and doubling back to figure out why there's such a gap between the sentences.

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+1. Defintely not! Presumably it's the full-stop after Dr which is causing the issue. If that's what is making it look wrong, just write Dr Wang without a dot. –  Andrew Leach Aug 13 '13 at 10:10
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Eh, I don't think you can skip the full stop after "Dr." because it's an abbreviation. We're not talking about the soda Dr Pepper here. –  Lauren Ipsum Aug 13 '13 at 10:52
    
Of course you can; it depends only on style rules. In fact I was taught at school that if the abbreviation finishes with the last letter of the word itself (like Doctor/Dr) it's better not to include it. Perhaps it's a British thing. –  Andrew Leach Aug 13 '13 at 11:16
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@AndrewLeach That must be a British thing; I have never heard of such a rule in the U.S. We're explicitly taught that you should never drop the period (full stop). But that's a regional difference, which is fine. –  Lauren Ipsum Aug 13 '13 at 13:32
    
You are not completely correct about double space. You can use an increased inter-sentence space, it's only most of the computer programs that can't handle it correctly, giving you the only option in double-space, which is wrong as is. –  tohecz Nov 19 '13 at 15:21

Ok, three things:

  1. Single spaces after periods is recommended in the AP Stylebook, the Modern Language Association style guide and the Chicago Manual of Style. Go with that. Nothing is more distracting than something that looks like a grammar error, so single spacing is your best bet.
  2. That said, consistency is king. If you use double spaces after periods, always use double spaces. If you use single spaces, always use single spaces. The abbreviated title here doesn't matter; just do whatever you did in the rest of the document.
  3. If you're dealing with this issue in a headline, use the single space and achieve balance with careful kerning and word spacing adjustments. I agree that the single space looks a bit awkward if I stare at it long enough, but the double space looks worse. It's way too heavy-handed.
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Overall, I like this answer. But (a) Isn't word spacing just fine tuning the double-space (to be a 1.8 space or whatever), many environments, like a web-form, won't allow that kind of adjustment and (b) is consistency really king? Consistency's a tautology that's broken down before: see Oxford comma ambiguities en.wikipedia.org/wiki/Serial_comma#Ambiguity –  mangledorf Aug 13 '13 at 17:38

I preface answers like this with the disclaimer that you can do whatever you want with English, really. Make up a word and get enough people to say it, and it'll find its way into the OED. You can learn all of the technical rules of typography, or you can pull a David Carson and blow up all of the rules. Language is really cool like that, and English's heritage in particular is just that: constant evolution.

That being said, I have never seen an instance where one document intentionally contains single and double spaces after periods. So, doing so would be very unconventional.

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No. Neither typographers nor editors would permit your example to survive a manuscript.

EDIT: If I were forced to use such a configuration, I would kern the punctuation marks to minimize the yawning chasm created visually by the excessive counterform spaces.

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