e.g. = exempli gratia ("given example", or "free" example)
i.e. = id est ("this is", or "in other words")
people mix these two up quite a bit.
use the first to list "items" separated by commas
use the second to explain a concept in other words.
Exempli gratia - used before a general example is given
Id est - used before a more specific phrasing of the previous sentence, often when the initial phrasing is formal but confusing, e.g. "If (blank), then the player must complete a 180° turn, i.e. The player must turn around"
i.e. = id est ("this is", or "in other words")
people mix these two up quite a bit.
use the first to list "items" separated by commas
use the second to explain a concept in other words.
Id est - used before a more specific phrasing of the previous sentence, often when the initial phrasing is formal but confusing, e.g. "If (blank), then the player must complete a 180° turn, i.e. The player must turn around"