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"If Not" - Meaning & Proper Usage (Helpful Examples)
Using IF with AND, OR, and NOT functions in Excel
IF NOT | English meaning - Cambridge Dictionary
If not Definition & Meaning - Merriam-Webster
‘If so’ and ‘if yes’, ‘if not’ and ‘if no’ in English
How to Use Logical Functions in Excel: IF, AND, OR, XOR, NOT
IF NOT definition and meaning | Collins English Dictionary
If not - definition of if not by The Free Dictionary
If not - Definition, Meaning & Synonyms | Vocabulary.com
Python 'If not' syntax - Stack Overflow