I'm not certain either

Grammar usage guide and real-world examples

Uses 'sure' instead of 'certain', offering a slightly more common and less formal tone in everyday dialogue.

Shifts the focus from a state of being uncertain to a direct lack of knowledge.

A much more concise and informal way to agree with a negative statement or doubt.

Uses an inverted structure for a slightly more formal and emphatic tone than 'me neither'.

Replaces 'either' with 'equally' to emphasize that the level of doubt matches that of the other person.

Uses a positive adverb 'also' with the negative adjective 'uncertain' to achieve a similar meaning.

A formal, literary construction used to join two negative clauses together.

Implies a stronger sense of skepticism or a lack of being persuaded rather than just a lack of knowledge.

Uses 'positive' as a synonym for 'certain', often implying a slightly higher degree of specificity is needed.

Adds a qualifier 'entirely' to suggest that while there is some knowledge, it is incomplete.