How many letters does the top answer for “cognitive science scientist” have?

The most common answer is chomsky (7 letters).

Crossword clue: cognitive science scientist

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

chomsky 7 letters wd-fact-v3

United States linguist whose theory of generative grammar redefined the field of linguistics (born 1928)

hayek 5 letters wd-fact-v3

English economist (born in Austria) noted for work on the optimum allocation of resources (1899-1992)

science scientist 67% similar → bacon, comenius

applied science scientist 50% similar → gerlach

archival science scientist 50% similar → ehrle

earth science scientist 50% similar → alkhwarizmi

forensic science scientist 50% similar → middendorff

history of science scientist 50% similar → keller, oreskes

library science scientist 50% similar → ehrle, safarik

materials science scientist 50% similar → young