Looking on the internet deeply has found these results:

speculation is the most popular phrase on the web.

speculative theory 146,400 results on the web	speculation 154,400,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Now, this is wild and speculative stuff, but it's actually not so very far of what string theory predicts.	But there is currently bad speculation. Now, that's just speculation at the moment. Kraang's speculation of finding the turtles sooner rather than later has proven to be correct. Take action to stop this appalling speculation on cereals. Any answer at this time would be pure speculation on my part. There is nothing certain about speculation. The scope of speculation is uncontrolled. We need measures to halt speculation on sovereign debt.

speculative theory

146,400 results on the web

speculation

154,400,000 results on the web

More popular!

Now, this is wild and speculative stuff, but it's actually not so very far of what string theory predicts.

But there is currently bad speculation.
Now, that's just speculation at the moment.
Kraang's speculation of finding the turtles sooner rather than later has proven to be correct.
Take action to stop this appalling speculation on cereals.
Any answer at this time would be pure speculation on my part.
There is nothing certain about speculation.
The scope of speculation is uncontrolled.
We need measures to halt speculation on sovereign debt.