From Occult Adventures:
"Instead of verbal and somatic components, all psychic
spells have components related to the caster’s inner
being. The two psychic components are called emotion
components and thought components. If a spell’s
components line lists a somatic component, that spell
instead requires an emotion component when cast by
psychic spellcasters, and if it has a verbal component,
it instead requires a thought component when cast by
psychic spellcasters. Psychic spells cast by non-psychic
arcane and divine casters use any listed somatic and
verbal components as normal."
Additionally:
"Just as spell-like abilities never require verbal, somatic,
or material components, these abilities also don’t require
thought or emotion components. A psychic spellcaster
can replace verbal and somatic components with thought
and emotion components only for the purposes of the
spell components themselves, not for the purposes of
any other rules elements that relate to verbal and somatic
components."
So, barring a psychic magic user casting a spell that has somatic and verbal components as part of the effect (or what have you), is there a cue I'm missing that allows for another character to 1) know that a spell is being cast before the effect actually occurs and 2) who actually cast the spell in the case of a spell that otherwise has no listed cues?
This seems like an oversight more than a design decision, and any clarification is appreciated.