If the respondent did not answer the intended question, we have three options:
<UL>
<LI><b>No warning</b> means that respondents can continue the survey without warning, even if they do not answer a particular question.</LI>
<LI><b>Hard warning</b> means that if respondents do not answer the question with a hard warning, they are notified that they cannot continue solving the survey.</LI>
<LI><b>Soft Warning</b> means that respondents do not receive a warning if they do not respond, but can still proceed with the rescue.</LI>
</UL>