You will judged not on what you knew, but what you could have known if you had chosen to do so.
There is spiritual knowledge to be had which is just as real as objective knowledge. This knowledge can only be had through seeking a witness of the spirit AND then receiving that witness. If you are willing to pursue this knowledge you will eventually be guided to the very same process which was described by the prophet Moroni. This knowledge always comes to those who seek it out with real intent. Frequently, the receipt of this knowledge is timed to the particular needs of the individual. Since faith is a necessary attribute of the test of life, your faith may be tested as you strive to receive your personal witness. Whether you receive this witness or not is your responsibility.
The work of God is about developing a particular kind of human being. This human being is capable of tuning into God, remembers how to get back in tune when the inevitable vicissitudes of life cause a disconnect in the signal and, in general, relying on faith to reestablish this signal when strength is needed.
The ONLY WAY to know this is through the process of receiving a spiritual witness. If this idea calls to you in any way, this is the first faint signal of the spirit calling you to act upon this suggestion to get in touch. Then the signal will increase if you let it guide you. Inevitably you will be led to the prophet of the restoration, Joseph Smith and ultimately to Jesus Christ whom he serves.
It's a simple matter of choice.
[Sometimes I just like to see if I can remember the reasoning.]