The phrase "a more demonstrable" is correct and usable in written English.
It can be used when comparing the clarity or evidence of something, indicating that one option is more capable of being demonstrated than another.
Example: "The new method provides a more demonstrable improvement in results compared to the previous approach."
Alternatives: "a clearer demonstration" or "a more evident".
"His advisers knew it was long past time for him to assert himself in a more demonstrable way or risk seeing the entire enterprise slip away," Dan Balz reported the next day, in the Washington Post.
Amid such focus on pace and power, speedsters such as Owen and Walcott or powerhouses such as Rooney can dominate youth-level matches in a more demonstrable manner than the way an equally gifted but less physically imposing player might influence a game in a different country.
He had crimes with a more demonstrable danger to the community he protects to mull over.
There has never been a more demonstrable effect of socialism's positive effect on the American economy.
The ratio of protein family birth to protein domain birth (domain shuffling index) suggests that shuffling had a more demonstrable effect on protein families in nematodes and arthropods than in vertebrates.
The league also said that in reviewing goals that have been kicked into the net, Hockey Operations will require more demonstrable video evidence of a "distinct kicking motion" in order to overrule a "goal call" on the ice, or to uphold a "no-goal call" on the ice.
Yours for better TV and more demonstrable affection.
As ever with royal symbolism, in the abbey this seemed more demonstrable in terms of signs and allusions than reason or argument.
For new projects and "small-time" entrepreneurs, insufficient information and historical data might be available; by contrast, repeated projects can have more demonstrable information.
More demonstrable is the homage paid to Epictetus by Simplicius, the sixth-century Aristotle commentator, who composed a long philosophical commentary on the Encheiridion combining Stoic elements with his own Neoplatonism.
Our decision to focus on studies of presymptomatic rather than symptomatic subjects was based on the premise that most putative therapies for AD are likely to have more demonstrable effects on normal subjects compared to those with overt AD whose brains have already been subject to extensive neurodegenerative changes.
