Learn Polish: Nie wiem dokładnie, gdzie się jutro spotykamy, ale znam drogę. - I don't know exactly where we are meeting tomorrow, but I know the way.

This is the main difference between the two verbs for "to know". We use wiedzieć (here as wiem) when we know a fact or piece of information, and it is usually followed by a question word like gdzie (where) or a full clause. We use znać (here as znam) when we are familiar with a noun, like a person, place, or thing. Since "the way" (droga) is a thing, the second half of the sentence must use znam.

Why is the word for "way" spelled drogę instead of its dictionary form droga?

The verb znać (to know a person or thing) requires the object receiving the action to be in the Accusative case. For feminine nouns ending in -a like droga (the way), the ending changes to -ę in the Accusative. Therefore, droga becomes drogę.

Why is the reflexive word się placed in the middle of the phrase gdzie się jutro spotykamy?

The word się is used with spotykać to mean "to meet each other". In Polish, short words like się naturally tuck themselves into the middle of a clause. They often jump to the position right after the first word of the phrase (here, after the question word gdzie) and generally avoid being the very last word of the sentence.

Spotykamy means "we are meeting" right now. Why is a present tense verb used with jutro (tomorrow)?