If you're sincerely seeking God, God will make His existence evident to you.

Part of the broader task of Christian scholarship is to help create and sustain a cultural milieu in which the gospel can be heard as an intellectually viable option for thinking men and women.

Scepticism, ironically, draws its life's blood from claims to have a good deal of knowledge. For example, your friends claim to know, 'Since every possible option has not been explored, nothing can be said for certain.' That statement is itself a claim to knowledge!

The Gospels were written in such temporal and geographical proximity to the events they record that it would have been almost impossible to fabricate events. Anyone who cared to could have checked out the accuracy of what they reported. The fact that the disciples were able to proclaim the resurrection in Jerusalem in the face of their enemies a few weeks after the crucifixion shows that what they proclaimed was true, for they could never have proclaimed the resurrection under such circumstances had it not occurred.

The mere possibility provides no warrant for denying what I clearly grasp.

Certainty is an unrealistic and unattainable ideal

Why would one's identity be a matter of feelings? I think that that's a misuse of terms, philosophically. Identity is mind independent. It's something that is objective, regardless of how you feel. So, the term gender identity seems to me to be something of an oxymoron. It's not really about one's identity. It's rather a matter of one's self-perception or one's feelings about oneself.