A very specific question, that I'm hoping someone out there can quickly clear up. I have not completed DIT, but am involved in the assessment of instructors. Several weeks ago, an instructor looked at me in horror when I suggested that he vary his questioning technique to elicit informed responses from his students along the following lines: "Why do you think this projectile is shaped like this, rather than like that...?" (regarding arty ammunition, not that it matters for the purposes of this question) He explained to me that as a DIT-compliant instructor he would sooner pluck out his eyeballs than use the phrase "why do you think..." to a student, because he had been taught that this is NOT an acceptable way of testing students. He gave me a flowery and highly unsatisfactory explanation of the reasons behind this, which lead me to believe that he didn't fully understand the logic himself but had nonetheless commit the mantra to memory... thou shalt not ask a student 'what/why do you think...'.... Now for my question: 1. Is he correct? Does DIT-compliance mean that instructors should refrain from using this phrase? 2. What is the logic behind it, from the DIT point of view? 3. (Most importantly, please) Can someone offer me a reference for this? Very much obliged!