> These two aspects of the gameplay cannot be completely separated, because strategic goals are mostly achieved through tactics, while the tactical opportunities are based on the previous strategy of play.

And yet when you ask a chess player whether the situation has a tactic or a strategy in it (in some cases both), they can tell you which choice is a tactic and which is a strategy. Tactics are so well recognized that you can practice them: https://www.chess.com/puzzles/rated