Are you a “brahmana”?

This is a story from the Chandogya Upanishad, about a boy named as Satyakama Jabala.

“Once, Satyakama, the son of Jabala, asked his mother, ‘I want to live as a brahmacari. Which dynasty (gotra) do I belong to?’ Jabala answered, ‘My son, I do not know which dynasty you belong to; in my youth I served as a midservant in various places and at that time begot you as my son. Therefore I don’t know which gotra you belong to. My name is Jabala and your name is Satyakama. Therefore you should say that your name is Satyakama Jabala.’

Thereafter Satyakama Jabala approached Haridrumata Gautama and said, ‘I wish to live with you as a brahmacari.’ Gautama replied, ‘O gentle one, which dynasty do you belong to?’ Satyakama replied, ‘ I do not know which dynasty I belong to. I asked my mother and she said, ‘I begot you as my son when I was wandering in my youth as a maidservant. Therefore I do not know which dynasty you belong to. My name is Jabala and your name is Satyakama. So I am called Satyakama Jabala.’ Gautama then said to him, ‘My dear son, no one other than a brahmana can speak such truth that you have spoken. Therefore you are a brahmana, and I accept you’.

I wonder how many so called ‘brahmins’ of the present age can really call themselves as “Brahmanas” based on this yardstick.