Cheers!
Is that a straight question or another covert assault?
Wiki has a good explanation.
BRIEFLY:
TYPE I ERROR; SAYING SOMETHING IS THERE, WHEN THERE’S NOTHING THERE.
TYPE II ERROR: SAYING NOTHING IS THERE WHEN SOMETHING IS THERE.
THERE’S A STATISTICAL RELATIONSHIP BETWEEN THE TWO CHANCES. THE MORE ONE LEANS OVER BACKWARDS AVOIDING A TYPE I ERROR, THE MORE CERTAIN HE MAKES EXPERIENCING A TYPE II ERROR.
Invariably naysayers are either ignorant of that or pretend it’s not true . . . when it’s a long, very long accepted fact.