"Sophistical" refers to something characteristic of or relating to sophistry, which is the use of clever but fallacious arguments or reasoning to deceive or mislead.
The sophistical movement was then, primarily, an attempt to provide a general or liberal education which should supplement the customary instruction in reading, writing, gymnastic and music. But, as the sophists of the first period chose for their instruments grammar, style, literature and oratory,
sophistical הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד