[Tex/LaTex] Separating some paragraphs with a blank line, and other paragraphs without a blank line

indentationparagraphs

I want to be able to write blocks of paragraphs that share the same idea like this.

__1. This a a sentence about something. I continue with another sentence. With this sentence I conclude an idea, and a new paragraph is needed.

__2. I start another short paragraph here, but I did not leave a blank line between both paragraphs, because they talk about the same general idea. With this sentence I end that general idea and my paragraph.

__3. Now I am talking about some other stuff that is not related to the previous idea, but does not need a new section. I want to have a blank line between both paragraphs.

The __ is an indentation, and the paragraphs are numbered. Right now I have what is shown here; there is a blank line between all paragraphs, but I do not want that blank line between paragraph 1 and 2.

Right now I am using \setlength{\parskip}{\baselineskip} to get a new line between paragraphs, but I can't seem to find a way to not have that blank line between certain paragraphs.

Is there some easy way to achieve this?

Best Answer

Add \medskip (or \bigskip), that's all.

This a a sentence about something. I continue with another sentence. With
this sentence I conclude an idea, and a new paragraph is needed.

I start another short paragraph here, but I did not leave a blank line
between both paragraphs, because they talk about the same general idea. With
this sentence I end that general idea and my paragraph.

\medskip

Now I am talking about some other stuff that is not related to the previous
idea, but does not need a new section. I want to have a blank line between 
both paragraphs.

Don't set \parskip for this.

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