The core statement of the abstract is that the author's conclusions are the "clear an unanimous" views of "those studying nervous system evolution". This state

The core statement of the abstract is that the author's conclusions are the "clear an unanimous" views of "those studying nervous system evolution". This statement is incorrect on its face. Worse, it would be a bad scientific statement in any paper. Last, it is at once superfluous and incomplete even if it were true. Instead, a good abstract would briefly list the points of the author's preferred theory rather than waste the reader's time by only deferring to a loosely defined general authority in support of an assertion. Which is abstract writing 101, at least in fields for which writing standards are somewhat kept. Maybe that isn't the psychology field, but it should be. The last sentence of the abstract reads as if written by said high school junior. Science authors generally don't use the word "mistaken" to describe another theory, especially in the context of theories of brain evolution nor for anything else for which literally every theory can only be a theory. Including that preferred by the author. Good papers don't introduce their arguments / pov halfway through, or further. Good papers don't lean on deference to authority 1/2 paper before presenting what is supposed to be their evidence or theory. Good papers almost completely exclude adjectives when describing theories, conclusions, or data, let alone negative adjectives that are doing all of the work in making their yet-unsupported point.