The explanation of this illusion on the simple basis of underestimation or overestimation of angles is open to criticism.
Which, all things considered, was an underestimation of what ensued hard on the heels of his announcement.
In the case of interval A the error is one of underestimation in twenty-seven cases; in none is it an error of overestimation.
It was an underestimation so great that in the light of developments it will some day prove ridiculous.
In the case of interval B the error is one of overestimation in seventeen instances, of underestimation in two.
She falls an easy victim now to that underestimation of her business which is so popular.
That was an error on my part; I was unintentionally guilty of the crime of underestimation.