review / overview / hypotheses / mentions / wonders / considers / investigates whether [or not] X can …
He traces the advances in / development of / history of / evolution of X They draw our attention to / focus on X.
They make / draw a distinction between …
He claims / argues / maintains / suggests / points out / underlines that … She concludes / comes to the conclusion / reaches the conclusion that …
She lists / outlines / describes / provides several reasons for …
Her theory / solution / proposal / method / approach is based on …