guesswork
US /ˈɡes.wɝːk/
UK /ˈɡes.wɝːk/

1.
conjetura, suposición
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.
El número exacto de asistentes sigue siendo una cuestión de conjeturas.
•
Much of the early research involved a lot of guesswork.
Gran parte de la investigación inicial implicó muchas conjeturas.