Analysis of information sources in references of the Wikipedia article "Grok" in English language version.
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In the 1949 short story "Venus and the Seven Sexes" by William Tenn, the author coined the term "griggo" as a Venusian basic sense describing "intuitive understanding". Tenn used "griggo" as both a noun and a verb in phrases such as "I griggoed his impatience." Over a decade later, acclaimed sci-fi author Robert Heinlein published his 1961 novel Stranger in a Strange Land, which introduced the word "grok" with a similar meaning of deep, empathetic comprehension. Heinlein's "grok" became hugely influential in 1960s counter-culture and lexicon. When asked if he was inspired by Tenn's prior "griggo," Heinlein admitted "It's possible, very possible."