The phrase "a speculative basis" is correct and usable in written English.
It can be used when discussing assumptions or theories that are not yet proven or are based on conjecture.
Example: "The research was conducted on a speculative basis, as the data was not yet conclusive."
Alternatives: "a conjectural foundation" or "an uncertain premise".
As often happens in advertising, the agency had developed the campaign on a speculative basis.
"These landlords who were suffering with unoccupied buildings were not asked to invest on a speculative basis," Ms. Gibbs said.
Plans for BioBat have dismayed Joel S. Marcus, the chief executive of Alexandria, which is developing East River Science Park on a speculative basis.
Use different methods such as word of mouth, keeping in touch with old colleagues and managers, and contacting organisations where your skills and background is relevant on a speculative basis.
But for a prebuilt space, the landlord builds out the entire interior of the office on a speculative basis, so a tenant could walk in off the street and start business tomorrow.
"We're going to see much bigger builders and much bigger lenders facing bankruptcy because so much of the building has been on a speculative basis," said Jack McCabe, a real estate consultant in Deerfield Beach, Fla.
On a purely speculative basis, we could consider that one MFH subgroup would be genetically characterised by gain of 17q, and clinically by a less aggressive course with a low risk of metastases and local recurrences, and hence a better survival.
In summary, a plausible, but speculative, basis for how cnaB1 and - 2 confer calcium tolerance to the crzAΔ strains are a modification in calcineurin activity, a change at the docking site or altered affinity for calcium binding.
So there is little chance for an imaginative reporter to hop off abroad on the basis of a speculative tip.
In order to clarify the rationale behind this process, a speculative explanation was provided on basis of the experimental results and the theory of Uras (Uras & Devlin, 2000).
Bennet (2003) recently proposed a speculative model for the genetic basis of primary melanoma in relation to cell senescence.
