Disquisition
Disquisition , noun
[Latin disquisitio, from disquirere to inquire diligently, investigate; dis- + quaerere to seek. See Quest.]
A formal or systematic inquiry into, or discussion of, any subject; a full examination or investigation of a matter, with the arguments and facts bearing upon it; elaborate essay; dissertation.
For accurate research or grave disquisition he was not well qualified.