Synonyms of 'a shot in the dark'
▷ See shot
guessDictionary, speculation, conjecture
It was a shot in the dark but I decided to write to him.
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A conjecture is a conclusion that is based on information that is not certain or complete.
Your assertion is merely a conjecture, not a fact.
I had published my speculations about the future of the universe.
If you say that a particular conclusion is surmise, you mean that it is a guess based on the available evidence and you do not know for certain that it is true.
His surmise proved correct.
Thesaurus for a shot in the dark from the Collins English Thesaurus
If you describe something someone says or does as a shot in the dark or a stab in the dark , you mean they are guessing that what they say is correct or that what they do will be successful .