Final answer:
Software spell-checkers are incomplete tools for proofreading because they have limitations and can make mistakes. They may not recognize certain words or technical terms, suggest incorrect replacements, or miss actual errors in grammar or punctuation. They also cannot detect errors in sentence structure, coherence, or issues like repetition and lack of clarity in writing.
Step-by-step explanation:
Software spell-checkers are incomplete tools for proofreading because they have limitations and can make mistakes. While they can catch common misspellings, they may not recognize certain words or technical terms. Additionally, spell-checkers do not consider context, so they may suggest incorrect replacements or miss actual errors in grammar or punctuation. For instance, if you type 'their' instead of 'there', the spell-checker may not flag it as an error.
A good example of this is that spell-checkers often miss homophones, which are words that sound the same but have different meanings and spellings. For example, a spell-checker may not catch the incorrect usage of 'to,' 'too,' or 'two.' Another limitation is that spell-checkers cannot detect errors in sentence structure or coherence. They also do not flag issues like repetition or lack of clarity in writing. These are aspects of proofreading that require human judgment and understanding.