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\feedback{CONDITION}{MESSAGE}
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\feedback{CONDITION}{MESSAGE}
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</pre>
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</pre>
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The line can be put into the field of parameters (under guided mode) or
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The line can be put into the field of parameters (under guided mode) or
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anywhere in the source (under raw mode).
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anywhere in the source (under raw mode).
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<p>
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<p>
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When <tt>CONDITION</tt> is met,
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When <span class="tt">CONDITION</span> is met,
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<tt>MESSAGE</tt> will be shown to the user in the result page. Values of
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<span class="tt">MESSAGE</span> will be shown to the user in the result page. Values of
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user replies can be put into both via the variables <tt class="wims_code_variable">\reply1</tt>,
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user replies can be put into both via the variables <span class="tt wims_code_variable">\reply1</span>,
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<tt class="wims_code_variable">\reply2</tt>,... (for freestyle replies), <tt class="wims_code_variable">\choice1</tt>,
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<span class="tt wims_code_variable">\reply2</span>,... (for freestyle replies), <span class="tt wims_code_variable">\choice1</span>,
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<tt class="wims_code_variable">\choice2</tt>,... (for multiple choices). The order in the variables
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<span class="tt wims_code_variable">\choice2</span>,... (for multiple choices). The order in the variables
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is the order of their appearance in the source (or in the form under the
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is the order of their appearance in the source (or in the form under the
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guided mode).
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guided mode).
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<p>
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<p>
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<tt>MESSAGE</tt> is a free text, accepting embedded html tags and
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<span class="tt">MESSAGE</span> is a free text, accepting embedded html tags and
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mathematical symbols.
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mathematical symbols.
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<p>
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<p>
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One can use also the variables <tt class="wims_code_variable">\sc_reply1</tt>, <tt class="wims_code_variable">\sc_reply2</tt>,
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One can use also the variables <span class="tt wims_code_variable">\sc_reply1</span>, <span class="tt wims_code_variable">\sc_reply2</span>,
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... which are equal to  1 in case of good user reply, 0 in case of false
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... which are equal to  1 in case of good user reply, 0 in case of false
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user reply and 0.5 in case of good reply up to numerical precision. This variable
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user reply and 0.5 in case of good reply up to numerical precision. This variable
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does not take care of conditions and is empty in the case where the
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does not take care of conditions and is empty in the case where the
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answer is analyzed only with conditions.
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answer is analyzed only with conditions.
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$table_tr<td><tt class="wims_code_words">3 isitemof \reply1
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$table_tr<td><tt class="wims_code_words">3 isitemof \reply1
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  <td>the first reply, of type "set" or "vector", contains a component "3".
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  <td>the first reply, of type "set" or "vector", contains a component "3".
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$table_end
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$table_end
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<p>
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<p>
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<b>Known-bug</b>. You should avoid mixing <tt class="wims_code_variable">\reply</tt> and
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<b>Known-bug</b>. You should avoid mixing <span class="tt wims_code_variable">\reply</span> and
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<tt class="wims_code_variable">\choice</tt> within one same condition. Otherwise the result will be
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<span class="tt wims_code_variable">\choice</span> within one same condition. Otherwise the result will be
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unpredictable.
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unpredictable.
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