This isn't elegant but for a limited amount of data it will work. I populated A1:A15 with formulae that drew data from other cells some of which were blank for testing.
Formula:
=SUBSTITUTE(IF(A1<>"",A1&", ")&IF(A2<>"",A2&", ")&IF(A3<>"",A3&", ")&IF(A4<>"",A4&", ")&IF(A5<>"",A5&", ")&IF(A6<>"",A6&", ")&IF(A7<>"",A7&", ")&IF(A8<>"",A8&", ")&IF(A9<>"",A9&", ")&IF(A10<>"",A10&", ")&IF(A11<>"",A11&", ")&IF(A12<>"",A12&", ")&IF(A13<>"",A13&", ")&IF(A14<>"",A14&", ")&IF(A15<>"",A15),"FALSE","")
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