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Rule "outside of (outside)"

This is one of many errors that LanguageTool can detect.

Description: outside of (outside)
Message: This phrase is redundant. Consider using <suggestion>\2</suggestion>.
Category: Redundant Phrases (ID: REDUNDANCY)
Link: https://languagetool.org/insights/post/wordiness/
Incorrect sentences
that this rule can detect:
  • Go outside of the building and you will find it.
    Correction suggestion: outside
Correct sentences
for comparison:
  • It is on the outside of the building.
  • ...ence in electric potential between the inside and outside of cells, known as the membrane potential.
ID: OUTSIDE_OF [1]
Version: 6.8-SNAPSHOT (2025-10-21 22:33:07 +0200)