utilitarian way of thinking

theory of light quantum

argue / controvert / have a scrap with / engage in controversy / have words / have a dispute / discuss / wrangle / brawl / squabble / dispute / quarrel

discussion / engaging in controversy / argue / discussing / controvert / controverting / controversy / engage in controversy / having a dispute / have a dispute / debating / discuss / debate / disputing / argue with / dispute / argument / arguing

discuss / wrangle / argue / controvert / brawl / have a scrap with / engage in controversy / squabble / dispute / have words / have a dispute / quarrel

argue / controvert / have a scrap with / engage in controversy / have words / have a dispute / discuss / wrangle / brawl / squabble / dispute / quarrel

be well-fattened / be strapping

dipper for night-soil

shrimp-plant / Beloperone guttata <scientific name>

skating