After a brief overview of the advent of functional approaches to language in the mid– and late 1900s, stressing the importance of investigating pragmatic, i.e. implicit aspects of language use, and of simultaneously approaching language from different perspectives, this overview stresses the importance of understanding – rather than of finding some definite truth about language. The analysis of pragmatic particles (you know, like, well) in the mid–1960s showcased a plethora of challenges for investigations of language function and use that had previously not attracted scholars’ attention. This strand of research has fruitfully continued, especially so within the DiPVaC community, and constantly opens up new avenues of research. This overview lastly offers a reinterpretation of the author’s 1981 study of you know in terms of aspects of responsibility, suggesting that precisely responsibility – and its various facets – need to be given a more central task in future studies of language function and use, discourse, and pragmatics.