I'm not positive of her full question. I think she is asking if believing in God can be an objective truth.
A1 Objective truth
B1 Basically is reality.
B2 It is raining outside. True or false?
B3 God exists. True or false?
B4 How do we test if these are true?
B5 Does God exist?
A2 Reasonable truth is what a Christian claims.
A3 Christians don't believe in blind faith.
B1 Many may have not thought this through, and so they are ignorant.
B2 We have a reasonable faith.
A4 Again I refer to Cold Case Christianity and Please Convince Me.