I've written a sonnet, and I need some help?

Alright, first of all, I need to know if this is in iambic pentameter. I do not know how to judge if it is or not, so if you could explain, please do. Secondly, if you see anything that I could change without ruining the rhyme or meter, please let me know. Four of the odd words are defined below.

Think About It

What sane person would want life uninformed?

Can we live while knowing that we know naught?

Would we cert know how much we need to mourn,

Or would we not know that we have learned zot?

For ignorance is a bitter rival,

Because its defeat is, in fact, absurd

If it is not first seen to be libel,

Though the delict is not of written word.

And none can certainly see that we’d ken

the true crime committed against our minds.

This may easily be true of all men,

And no one knows the sin that none can find.

Should we not be upset by what we miss?

Why no. Don’t you see? Ignorance is bliss.

Cert-certainly; surely

Zot-nothing

Delict-crime

Ken-to understand