Had they have gone to the same place, they would have talked to one another.
Is the sentence above acceptable? If not, then what is a proper way of saying this?
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Sign up to join this communityI think what you are trying to say is related to what is known as third conditional, which is used for things that didn't happen in the past. Here are a couple of examples that might be of help:
If he hadn't gone to school, he wouldn't have had an accident.
This means that he did go to school and that's why he had an accident. We are just adding a condition. Period.
It can also be said the following way:
Hadn't he gone to school, he wouldn't have had an accident.
It means the same thing. Just a bit shorter.
The two simplest alternatives to your current sentence are likely: "Had they gone…" and "If they had gone…", both of which are proper English and retain what I believe is your intended meaning.