Debugging a possible clash between plugins and/or a theme

I’ve had to explain this many times, so now I just  link here.  Instead of messing around randomly trying different things, hitting more buttons, approach your problem systematically.

from one of my favourite comics

Your theme and plugins can interact in ways that plugin or theme authors do not even realise.  For example tweaks to the wp query may unintentionally affect another plugin’s operation.  Inappropriate Javascript  inclusion also often clashes across wordpress.

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