I can't get the comment form to appear in my theme. It does appear in Garland, but not in Bartik.
I have copied node.tpl.php and comment.tpl.php into my theme from Garland.
I have added text to the node.tpl.php template to ensure that it is in fact the relevant template for the node.
I checked the page source to see if perhaps the comment form is appearing, but is hidden by CSS.
I deleted ALL code from the template.php file in the theme.
I have cleared the cache and run cron after doing all of the above.
I've built more than 100 Drupal sites, so I'm not exactly new to the framework. And yet I can't get the comment form to appear in this theme.
Clearly I must be doing something wrong, but I can't think of what else to check.
Remember, the comment box does appear in Garland, so this can't be a permissions issue and can't be due to settings in the node itself.
The Drupal version is 7.41.