correlation vs causation
/ˌkɒrəˈleɪʃən ˌvɜːrsəs kɔːˈzeɪʃən/
assuming that because two things correlate, one causes the other
“Ice cream sales and drownings both rise in summer—correlation, not causation.”
Origin: Latin correlatio mutual relation from cor- together + relatio vs. causatio causation from causa cause