Common confusion: parameter vs argument, and what the hell is type argument. First part of Kotlin programmer dictionary: Parameter vs Argument, Type parameter vs Type argument https://medium.com/kotlin-academy/programmer-dictionary-parameter-vs-argument-type-parameter-vs-type-argument-b965d2cc6929

nice article, but why does it matter? 😅

It matters when you are writing book or article. You should not confuse this words if you want. Rest of this the dictionary is important to express yourself when you cannot just point and say "this stuff over there".