B737-700
Flight Crew Air Transport Pilot (ATP)
Deviation / Discrepancy - Procedural Published Material / Policy; No Specific Anomaly Occurred Unwanted Situation
Company Policy; Human Factors; Weather
After landing in ZZZ on Aircraft X with a cold soaked wing and full main fuel tanks; I asked the rampers to do an ice check. One of the rampers brought out the ladder; checked the wing; and then told me the wing was clean. From my vantage point by the L1 door I found this hard to believe as it looked liked frost extending along the entire length of the wing. I politely asked the Ramper to bring back the ladder so I could inspect the wing. After he brought back the ladder; I climbed the ladder and found obvious frost along the length of the wing. I told the Ramper what I saw and asked him if he would like to look at the wing again. He immediately got pissed off; refused to look at the wing; told me it was clean; declared 'we're going to agree to disagree but I'll deice you' and walked off. ZZZ deiced our aircraft without incident. Captains need to stand their ground and ensure deicing is completed when warranted.  Further; I have never experienced anything similar to this at (airline).
B737-700 Captain reported a ramp worker providing false assessment of wing icing.