Technical specificity is the precision with which a description identifies an object or property. Factual accuracy is whether that identification or property is correct; credibility is the confidence an audience assigns to the account.
Three separate properties
A model name can be exact and wrong. A broad description can be correct but insufficient for a particular question. A convincing presentation can contain either kind of statement.
Adventure fiction gives technical detail an additional role: a recurring object can maintain character identity. Nick Carter’s fixed weapons were an editorial requirement. Their repetition served continuity whether or not a passage supplied an independently useful explanation of equipment performance.
Cover art adds visual specificity. A detailed reference practice can help produce a recognizable representation without certifying every aspect of the depicted object.
Precision without the right variable
Flashlight ratings illustrate a factual version of the problem. Lumens and candela are both precise quantities, but they describe total output and directional intensity respectively. Giving an exact lumen figure does not answer a question about peak beam intensity.
Take a product comparison that ranks two lights using only one quantity while claiming superiority in the other. The numbers can be accurately copied, yet the conclusion can still fail because the measured property changed.
The problem is not lack of detail. It is a missing relationship between the detail and the conclusion.
Expertise as a presentation effect
A technical vocabulary makes some claims easier to verify because it identifies the relevant model, property or configuration. The same vocabulary can also make an unsupported conclusion look more fully specified than it is.
Whether that appearance increases trust in a particular audience cannot be determined from the passage alone. Textual analysis can establish what the detail does in the argument; an audience response is another empirical question.
Verification at the point of use
The useful check is to ask which conclusion each precise detail supports. A model name supports identification. A measurement supports a defined property under its test conditions. Repetition supports continuity across the inspected instances.
Technical detail becomes evidentially useful when that relationship is explicit. Its mere abundance does not turn a character inventory, cover image or product description into a validated account of performance.