So that if someone posts a Trump tweet on Facebook, in the preview it’d also display a short fact-check from both sides
I don't even know what a partisan fact check is. If the intent is to fact check, there can't be multiple interpretations of it. A ranking of how truthful it is, which parts of a statement are accurately representing reality, like politifact's truth-o-meter, would be useful. Partisan fact checking is how you get things like "clean coal".
Fact checking, however, is a fight against entropy. It is easier to lie or misrepresent, even inadvertently, than it is to be fully informed enough to be always say fully, 100% true statements. The liers are not lying for lying's sake, they have an agenda, and they'd just as soon tell the truth if it would serve their purposes.
I don't even know what a partisan fact check is. If the intent is to fact check, there can't be multiple interpretations of it. A ranking of how truthful it is, which parts of a statement are accurately representing reality, like politifact's truth-o-meter, would be useful. Partisan fact checking is how you get things like "clean coal".
Fact checking, however, is a fight against entropy. It is easier to lie or misrepresent, even inadvertently, than it is to be fully informed enough to be always say fully, 100% true statements. The liers are not lying for lying's sake, they have an agenda, and they'd just as soon tell the truth if it would serve their purposes.