ɪɾ ɪz vˈɜːtʃuːəli ɪmpˈɑːsᵻbəl ˈiːvən fɔːɹ skˈɪld jˈuːzɚz tə nˈoʊ hˌaʊ mˈʌtʃ ʌvðə sˈʌbstəns hˈæzbiːn ɪvˈæpɚɹˌeɪɾᵻd, bˈɜːnd, ænd ɪnhˈeɪld.
It is virtually impossible even for skilled users to know how much of the substance has been evaporated, burned, and inhaled.