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> How many times did people try out perpetual motion machines? Or even turning lead into gold! A ton of famous scientist (i.e. Newton) were very busy with that

• olddustytrail 4y ago
  > A ton of famous scientist (i.e. Newton) The abbreviation "i.e." stands for "id est" and means "that is". So what you have written means "A ton of famous scientist (that is, Newton)"... Now while I'm sure Newton had gravitas (hah!), I doubt it amounted to a ton. You want to use the abbreviation for "exempli gratia" which is "e.g." and means "for example". It's a common mistake but easy to remember with eg-xample. :-)