Breakdown of tashika ni kore wa kare no saifu desu.
ですdesu
to be
はwa
topic particle
これkore
this (one) pronoun
のno
possessive case particle
彼kare
he
確か にtashika ni
surely; certainly; indeed
Where きっと expresses a strong belief or confidence that something will happen or is the case, 確か に often additionally implies that the speaker has evidence or reasoning to support the certainty, or has personally verified the fact.
財布saifu
wallet
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