Phrase for saying we can only speculate

You can write it in a passive voice:

"This can only be speculated at this point."

You can check the usage in more formal texts here site:gov "can only be speculated"

or

This is only speculation at this point.

This is a matter of speculation at this point.

site:gov "a matter of speculation at this point"


As in:

"We can only presume at this point."

presume TFD

  1. To take for granted as being true in the absence of proof to the contrary: