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TIL the steel man argument (or steelmanning) is the opposite of the straw man argument. The idea is to find the best form of the opponent's argument to test opposing opinions. Steelmanning will make you better at arguing and improve your critical thinking.

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vPyK TIL the word “decide” has the same partial etymology (-cide) as homicide, regicide, pesticide. Basically, it means to determine by killing off choices.
8aR5L TIL in the 1995 Oklahoma City Bombing, there was a mysterious detached leg found in the rubble of the destroyed building. Since all 168 victims’ legs have been accounted for, the left leg has perplexed investigators and has yet to be traced back to an owner.
0w4LN TIL of Silphium, a plant from classic antiquity that was so valuable that it was supposedly overharvested to extinction. The plant only grew in a narrow coastal area in Cyrenaica (Libya). It was widely used as seasoning, perfume, as an aphrodisiac, and medicine.
gM1Gb TIL the Japanese squadron that bombed Pearl harbour was detected by a prototype Hawaiian Radar before the air raid but no alert was sent out, as nobody believed the inexperienced radar operators.
gMkmA TIL that singer Kirsty MacColl died a hero. While in Mexico, a speedboat was heading right at her and her son. She managed to push her 15 year old son out of the way just in time, but was runover in the process. She was killed instantly.