Scienter, the intent to deceive, is best understood as:

I know l$\text{'}$m lying; I might be lying: I don't care if I$\text{'}$m lying.

I know l$\text{'}$m lying; It doesn't matteffif I$\text{'}$m lying; The lie doesn't induce assent

I could be lying, so perform your due diligence; I might be lying: I didn't double check my knowledge

I didn't exercise due care when I lied; I knew better than to lie; It doesn't matter if I$\text{'}$m lying