guesswork

US /ˈɡes.wɝːk/
UK /ˈɡes.wɝːk/
"guesswork" picture
1.

conjecture, supposition

the process of making a judgment or decision without having enough information to know for certain what is correct or true

:
The exact number of attendees is still a matter of guesswork.
Le nombre exact de participants est encore une question de conjecture.
Much of the early research involved a lot of guesswork.
Une grande partie des premières recherches impliquait beaucoup de conjectures.