<button class="btn btn-small" ng-click="agree(sc._id, $event)">
    <span class="glyphicon glyphicon-question-sign"></span></button>
<button class="btn btn-small" ng-click="refuse(sc._id, $event)">
    <span class="glyphicon glyphicon-thumbs-down"></span></button>
<button class="btn btn-small" ng-click="agree(sc._id, $event)">
    <span class="glyphicon glyphicon-thumbs-up"></span></button>'

<button class="btn btn-small" ng-click="notUnderstood()">
    <span class="glyphicon glyphicon-question-sign"></span></button>
<button class="btn btn-small" ng-click="refuse()">
    <span class="glyphicon glyphicon-thumbs-down"></span></button>
<button class="btn btn-small" ng-click="agree()">
    <span class="glyphicon glyphicon-thumbs-up"></span></button>'

Remove parameters from ng-click attributes
Remove parameters from ng-click attributes
