Evidence is provided by Ezra Klein at vox.com.
For example here is what Trump had to say about foreign policy, specifically getting the Russians out of Syria.
... Trump was asked what would do to get the Russians out of Syria. His answer was a meandering paean to his own likability:
I would talk to [Putin]. I would get along with him. I believe — and I may be wrong, in which case I'd probably have to take a different path, but I would get along with a lot of the world leaders that this country is not getting along with.
We don't get along with China. We don't get along with the heads of Mexico. We don't get along with anybody, and yet, at the same time, they rip us left and right. They take advantage of us economically and every other way. We get along with nobody. I will get along — I think — with Putin, and I will get along with others, and we will have a much more stable — stable world.
And here is Fiorina's response.
Compare [Trump's meandering] with Fiorina's crisp, machine-gun specifics:
What I would do, immediately, is begin rebuilding the Sixth Fleet, I would begin rebuilding the missile defense program in Poland, I would conduct regular, aggressive military exercises in the Baltic states. I'd probably send a few thousand more troops into Germany. Vladimir Putin would get the message. By the way, the reason it is so critically important that every one of us know General Suleimani's name is because Russia is in Syria right now, because the head of the Quds force traveled to Russia and talked Vladimir Putin into aligning themselves with Iran and Syria to prop up Bashar al- Assad.
Message: unlike Trump, I actually know what the hell I'm talking about.
And here is the truth.
Her answer on Russia, for instance, was bizarre.
The Sixth Fleet is already huge, and it's hard to say why adding to its capabilities would intimidate Putin — after all, America has enough nuclear weapons pointed at Russia to level the country thousands of times over. Her proposal for more military exercises in the Baltics seemed odd in light of the fact that President Obama is already conducting military exercises in the Baltics. And the US already has around 40,000 troops stationed in Germany, so it's hard to say what good "a few thousand" more would do. And pushing on a missile defense system in Poland is a very long-term solution to a very current problem. In total, Fiorina's laundry list of proposals sure sounded like a plan, but on inspection, it's hard to see why any of them would convince Putin to change course.
All this is one reason why Scriber thinks there were no winners in the Wednesday night GOP "debate." We heard from a bunch of misinformed, demagogic, ideological losers.