[Discussion Post 40] Dialectics of true and false propositions about two data
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This post was last edited by kareale88 on 2019-4-17 11:06 bg4.png [Discussion Post 40] Regarding the true and false propositions of the two data dialectics, when there is no flange connection in the dialectical connection, and the diameter of the lead-out pipe without insulation (cold) is greater than or equal to 200mm, the inner diameter of the required lead-out hole reinforced pipe welded pipe is not less than 350mm. Can it become a true proposition after changing it to the following?: When the diameter of the lead-out pipe without internal flange connection and no thermal insulation (cold) is equal to 200mm, the inner diameter of the required lead-out reinforced pipe welded pipe shall not be less than 350mm.
“≤”means less than or equal to, in simple logic, it is in the form of p or q. As long as either p or q is true, p or q is a true proposition, for example: Because 2
The former statement is obviously wrong. For example, it is possible to use a 370 inner diameter reinforced pipe for the 250 nozzle according to the first statement, but it is obviously inconsistent with the standard requirements. .