Wiki's explanation seems vague, because of it asking here to you guys. I hope you'll answer it. So, which definition is correct;
-mil supply reducted because of your discovered tech "number"
-mil supply reducted because you left behind/stepped forward at tech race, drifted away the civs tech balance
-mil supply reducted because of your discovered tech "number"
-mil supply reducted because you left behind/stepped forward at tech race, drifted away the civs tech balance