I don't think it has to do with language (unless by "language" you mean what I mean, in which case sorry for duplicating). I think it has to do with that a lot of what people call "truth" is a product of their opinions, feelings, hopes, desires, etc.
There are facts of course - like such and such event happened or not, such and such statistical data is showing this number of not. But it is never served raw, it is always garnished with opinion. E.g. the fact is that Trump signed certain executive order. But you can say it's "Muslim ban" or "temporary restriction on admittance of nationals from terror-ridden countries". Not the same.
And various "factchecking" sites are fully complicit in this and inject opinion as often as not - to the point exactly the same thing said by two different people can be deemed "mostly true" or "mostly false", moreover, exactly the same thing said by the same person can be "mostly true" and "false".
You can't hope to have robots make sense of it if we can't. You can, of course, build a neural network and train it, but it would just put "robot approved" stamp on biases of whoever trained it.