This text is total gallimatias until you explain what usage/context/discours you are refering to.
When saying of an observation that it is
direct when discussing
scientific observations, the usage of the term, "direct" (and I'm telling you because you asked) is a stipulative usage. That's as opposed to a lexical usage. In particular, it's how people of
science would use the term.
For instance, if someone claims that our
scientific observation that the moon rotates around our planet is not a direct observation, people of
science would deny that the observation is an indirect observation--as they should because they know the difference between direct observations and indirect observations, and they know the difference between the corresponding terms as stipulatively
used amongst professionals and amateurs alike in the scientific community.
Now, when armchair Willy Waltzes his happy dancing ass up and shouts out "that's an indirect observation", everybody in the room (well, except me because I'm not merely smart) is going to be caught off guard and fail to immediately grasp exactly what is being expressed. To the ear when those words are spoken sounds like a denial to the scientist that the observation is a direct observation, and to the non-scientists as well, it sounds like a denial that the observation is a direct observation. So, to all the smart people out there in the room, laymen and scientists alike, it seems so pretty clear to all in earshot that he disagrees that the observation is a direct observation and says aloud that the observation is an indirect observation. Clear to those that are merely smart, that is.
The tale-tell sign that should give us pause is the expressed thought that all observations are indirect observations. Dancing Willy hasn't a clue what an indirect observation is, and he even has less of a clue what those terms mean when stipulatively used by those fluent in science-speak.
He's denying something alright, but smart people can't base what that is on what he says alone, since what he says isn't what he means. Oh, he means something alright, but it's not what everyone in earshot thinks he means.
If anything should be abundantly clear, it's that a stipulative usage is a special kind of usage that if anything, is DIFFERENT than a lexical usage. Since Mr. I can dance the Waltz hasn't even a remote clue what an indirect observation is, as used by those in the know, and since he's saying it's not an indirect observation, it's not that he wrong. All the eyes just started popping and ears started buzzing. Listen, if he's he wrong about what he's saying, let's have a clue about what he means before we say so.
The denial is a denial, yes, but it's not a denial that it's direct observation, as used stipulatively. If a denial that it's a direct observation, as used lexically (without the influence of how it's usage is specialized).
What the laymen needs to realize is that the assertion that something is a direct observation is not necessarily a denial about what the laymen may otherwise think.