smart.core.min.js DOES NOT include a number of rarely used or obsolete functions and modifiers: {debug}, {fetch}, {insert}, {html_checkboxes}, {html_image}, {html_options}, {html_radios}, {html_select_date}, {html_table}, {include_javascript}, {mailto}, {math}, {textformat}, |capitalize, |cat, |count, |count_characters, |count_paragraphs, |count_sentences, |count_words, |string_format, |date_format, |indent, |spacify, |truncate, |wordwrap.
If you need one of those, use the full version smart.min.js.