Now, suppose you have some text in pdf or word, and you copy paste it into latex editor or powerpoint presentation. Combination of letters "fi" and "fl" will not show and instead it would be inserted a new row. For example, in pdf you have "your task is to find all x such as" and when you copy paste it into the latex editor or powerpoint presentation it becomes this:
"your task is to
nd all x such as"
Is my computer the problem or is this a rule? If this is a rule, why? My brain is not enough to see why sequences of type "fi" is so special. Please help, that appearance hits my nerve badly.