Learn Japanese with Anime - You Know The Basics of Combat? It’s A Preemptive Strike

NOTE

The difference between 知しる and わかる:

• 知しる is a dynamic verb, which describes an action meaning “to get to know or get the information”. It’s a transitive verb so it takes the particle を.
• わかる is a stative verb, which itself describes a state of being. It means “to be able to understand or figure out”. It’s an intransitive verb so it takes the particle が. 

✔︎ この漢字を知ってる？ – Do you know this kanji?
✔︎ この漢字がわかる？ – Can you understand this kanji?

✔︎ この人何歳か知ってる？ – Do you know how old this person is?
✔︎ この人何歳かわかる？ – Can you figure out how old this person is? (Can you guess?)

✖︎ よく考えれば知るよ – You’ll get the information if you think hard.
✔︎ よく考えればわかるよ – You’ll be able to figure it out if you think hard.

✖︎ 彼の電話番号はわかるけど、今はちょっと知らない – I can figure out his phone number, but I don’t know it now.
✔︎ 彼の電話番号は知ってるけど、今はちょっとわからない – I have (the information of) his phone number but I can’t tell you now (I need to get my address book).

✖︎ 説明を聞いても知らない – I can’t get the information even with your explanation.
✔︎ 説明を聞いてもわからない – I can’t understand even with your explanation.

NOTE

It sounds feminine when よ is directly attached to a noun or na-adjective without だ. When it’s attached to a verb or i-adjective, it doesn’t sound feminine. e.g. おいしいよ is used both in male and female speech.