Alexius Meinong was born on July 17, 1853 and died on November 27, 1920. Alexius Meinong would have been 67 years old at the time of death or 158 years old today.
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There is no clear answer, some youngins are old and some oldins are young. Another opinion: At least 80. On the lighter side. This answer was kindly dedicated to Lazarus